From 3a5689a0b6770d5ba22dfc71e8b177365b83561b Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 10:54:36 +0300
Subject: [PATCH 01/12] Change default widget opacity to 1

---
 ui/appui-react/src/appui-react/layout/_widgetopacity.scss | 2 +-
 ui/appui-react/src/appui-react/theme/ThemeId.ts           | 2 +-
 ui/core-react/src/core-react/layout-variables.scss        | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/ui/appui-react/src/appui-react/layout/_widgetopacity.scss b/ui/appui-react/src/appui-react/layout/_widgetopacity.scss
index e6bc9fc3496..dab9408acf9 100644
--- a/ui/appui-react/src/appui-react/layout/_widgetopacity.scss
+++ b/ui/appui-react/src/appui-react/layout/_widgetopacity.scss
@@ -5,7 +5,7 @@
 @forward "~@itwin/core-react/lib/core-react/style/themecolors";
 
 @mixin nz-widget-opacity {
-  opacity: var(--buic-widget-opacity, 0.9);
+  opacity: var(--buic-widget-opacity, 1);
   transition: opacity var(--iui-duration-1) ease;
 
   &:hover,
diff --git a/ui/appui-react/src/appui-react/theme/ThemeId.ts b/ui/appui-react/src/appui-react/theme/ThemeId.ts
index ff836c5cc4c..041a576eecc 100644
--- a/ui/appui-react/src/appui-react/theme/ThemeId.ts
+++ b/ui/appui-react/src/appui-react/theme/ThemeId.ts
@@ -40,7 +40,7 @@ export type ThemeId = `${ColorTheme}` | (string & {});
 /** The default widget opacity.
  * @public
  */
-export const WIDGET_OPACITY_DEFAULT = 0.9;
+export const WIDGET_OPACITY_DEFAULT = 1;
 
 /** The default widget opacity.
  * @public
diff --git a/ui/core-react/src/core-react/layout-variables.scss b/ui/core-react/src/core-react/layout-variables.scss
index 7859201434b..b83b15efb1f 100644
--- a/ui/core-react/src/core-react/layout-variables.scss
+++ b/ui/core-react/src/core-react/layout-variables.scss
@@ -6,7 +6,7 @@
 
 :root {
   /** Default Widget Opacity */
-  --buic-widget-opacity: 0.9;
+  --buic-widget-opacity: 1;
   /** Default Toolbar Opacity */
   --buic-toolbar-opacity: 0.5;
 

From a87056db61ab2474b3081e7938f36c809826f932 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 10:54:51 +0300
Subject: [PATCH 02/12] Ability to invalidate settings stored via AppUiSettings

---
 .../src/appui-react/uistate/AppUiSettings.ts  | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts b/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
index 7c1773af12e..8b3a6eea0d3 100644
--- a/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
+++ b/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
@@ -51,6 +51,11 @@ export class AppUiSettings implements UserSettingsProvider {
   private _settings: Array<UiStateEntry<any>> = [];
   private _applyingLocalSettings = false;
 
+  /** Bump this to invalidate stored settings. */
+  private static _currentVersion = 1;
+  private _storedVersion = 0;
+  private _version: UiStateEntry<number>;
+
   public colorTheme: UiStateEntry<ThemeId>;
   public dragInteraction: UiStateEntry<boolean>;
   public widgetOpacity: UiStateEntry<number>;
@@ -67,6 +72,16 @@ export class AppUiSettings implements UserSettingsProvider {
   };
 
   constructor(defaults: Partial<InitialAppUiSettings>) {
+    this._version = new UiStateEntry<number>(
+      AppUiSettings._settingNamespace,
+      "_version",
+      () => AppUiSettings._currentVersion,
+      (value: number) => {
+        this._storedVersion = value;
+      },
+      0
+    );
+
     this._settings = [];
 
     this.colorTheme = new UiStateEntry<ThemeId>(
@@ -186,6 +201,16 @@ export class AppUiSettings implements UserSettingsProvider {
 
   public async apply(storage: UiStateStorage): Promise<void> {
     this._applyingLocalSettings = true;
+
+    // Invalidate previously stored settings if the persisted version is outdated.
+    await this._version.getSettingAndApplyValue(storage);
+    if (this._storedVersion !== AppUiSettings._currentVersion) {
+      for (const setting of this._settings) {
+        await setting.deleteSetting(storage);
+      }
+      await this._version.saveSetting(storage);
+    }
+
     for (const setting of this._settings) {
       await setting.getSettingAndApplyValue(storage);
     }

From d1696ac024ddb35ab8107b9ec25c9be16b6fad9b Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 11:23:15 +0300
Subject: [PATCH 03/12] Deprecate opacity settings

---
 common/api/appui-react.api.md                 | 21 ++++++++++++-------
 common/api/components-react.api.md            |  2 +-
 common/api/summary/appui-react.exports.csv    |  2 ++
 .../api/summary/components-react.exports.csv  |  1 +
 .../ConfigurableUiContent.stories.tsx         |  3 ++-
 .../configurableui/ConfigurableUiContent.tsx  | 12 +++++++++--
 .../framework/FrameworkVisibility.ts          |  4 +++-
 .../src/appui-react/popup/CardPopup.tsx       |  1 +
 .../src/appui-react/popup/ToolbarPopup.tsx    |  1 +
 .../src/appui-react/theme/ThemeId.ts          |  2 ++
 .../src/appui-react/toolbar/Toolbar.tsx       |  5 ++++-
 .../appui-react/toolbar/ToolbarComposer.tsx   |  9 ++++++--
 .../toolbar/ToolbarWithOverflow.tsx           |  5 ++++-
 .../toolbar/new-toolbars/Surface.tsx          |  1 +
 .../src/appui-react/uistate/AppUiSettings.ts  |  2 ++
 .../widgets/NavigationWidgetComposer.tsx      |  2 ++
 .../widgets/ToolWidgetComposer.tsx            |  1 +
 .../toolbar/InternalToolbarComponent.tsx      |  5 +++++
 .../src/components-react/toolbar/Items.tsx    |  3 +++
 .../toolbar/OverflowPanel.tsx                 |  3 +++
 .../src/components-react/toolbar/Toolbar.tsx  |  1 +
 .../toolbar/ToolbarWithOverflow.tsx           |  1 +
 22 files changed, 70 insertions(+), 17 deletions(-)

diff --git a/common/api/appui-react.api.md b/common/api/appui-react.api.md
index fcf576dfc80..35471eb251e 100644
--- a/common/api/appui-react.api.md
+++ b/common/api/appui-react.api.md
@@ -994,10 +994,12 @@ export interface ConfigurableUiContentProps extends CommonProps {
     }) => React_2.ReactNode;
     showActiveWidgetLabel?: boolean;
     toolAsToolSettingsLabel?: boolean;
+    // @deprecated
     toolbarOpacity?: number;
     // @deprecated
     viewOverlay?: boolean;
     widgetIcon?: boolean;
+    // @deprecated
     widgetOpacity?: number;
 }
 
@@ -2259,6 +2261,7 @@ export interface FrameworkVisibility {
     showHidePanels: boolean;
     showUiAndCancelTimer(): void;
     showUiAndResetTimer(): void;
+    // @deprecated
     snapWidgetOpacity: boolean;
     // @deprecated
     useProximityOpacity: boolean;
@@ -2683,11 +2686,11 @@ export interface InitialAppUiSettings {
     dragInteraction: boolean;
     // (undocumented)
     showWidgetIcon?: boolean;
-    // (undocumented)
+    // @deprecated (undocumented)
     toolbarOpacity: number;
     // (undocumented)
     useToolAsToolSettingsLabel?: boolean;
-    // (undocumented)
+    // @deprecated (undocumented)
     widgetOpacity: number;
 }
 
@@ -3906,7 +3909,7 @@ export const SessionStateActions: {
     setNumItemsSelected: (numSelected: number) => ActionWithPayload<SessionStateActionId.SetNumItemsSelected, number>;
     setIModelConnection: (iModelConnection: any) => ActionWithPayload<SessionStateActionId.SetIModelConnection, any>;
     setSelectionScope: (activeSelectionScope: string) => ActionWithPayload<SessionStateActionId.SetSelectionScope, string>;
-    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuData> | DeepReadonlyObject<CursorMenuPayload>>;
+    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuPayload> | DeepReadonlyObject<CursorMenuData>>;
 };
 
 // @beta @deprecated
@@ -3944,7 +3947,7 @@ export const sessionStateMapDispatchToProps: {
     setNumItemsSelected: (numSelected: number) => ActionWithPayload<SessionStateActionId.SetNumItemsSelected, number>;
     setIModelConnection: (iModelConnection: any) => ActionWithPayload<SessionStateActionId.SetIModelConnection, any>;
     setSelectionScope: (activeSelectionScope: string) => ActionWithPayload<SessionStateActionId.SetSelectionScope, string>;
-    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuData> | DeepReadonlyObject<CursorMenuPayload>>;
+    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuPayload> | DeepReadonlyObject<CursorMenuData>>;
 };
 
 // @public @deprecated
@@ -4736,7 +4739,7 @@ export interface ToolAssistanceFieldProps extends CommonProps {
 // @beta
 export function Toolbar(props: ToolbarProps): React_2.JSX.Element;
 
-// @public
+// @public @deprecated
 export const TOOLBAR_OPACITY_DEFAULT = 0.5;
 
 // @public
@@ -4944,6 +4947,7 @@ export interface ToolbarProps extends CommonProps, NoChildrenProps {
     onItemExecuted?: OnItemExecutedFunc;
     onKeyDown?: (e: React_2.KeyboardEvent) => void;
     panelAlignment?: ToolbarPanelAlignment;
+    // @deprecated
     toolbarOpacitySetting?: ToolbarOpacitySetting;
     useDragInteraction?: boolean;
 }
@@ -4965,6 +4969,7 @@ export interface ToolbarWithOverflowProps extends CommonProps, NoChildrenProps {
     onKeyDown?: (e: React_2.KeyboardEvent) => void;
     overflowExpandsTo?: Direction;
     panelAlignment?: ToolbarPanelAlignment;
+    // @deprecated
     toolbarOpacitySetting?: ToolbarOpacitySetting;
     useDragInteraction?: boolean;
 }
@@ -5421,7 +5426,7 @@ export function useUiStateStorageHandler(): UiStateStorage;
 // @public
 export function useWidget(): {
     state: WidgetState;
-    widgetLocation: "popout" | "docked" | "floating";
+    widgetLocation: "popout" | "floating" | "docked";
     setState: (widgetState: Omit<WidgetState, WidgetState.Floating>) => void;
 };
 
@@ -5613,8 +5618,8 @@ export interface Widget {
     readonly useSavedState?: boolean;
 }
 
-// @public
-export const WIDGET_OPACITY_DEFAULT = 0.9;
+// @public @deprecated
+export const WIDGET_OPACITY_DEFAULT = 1;
 
 // @alpha
 export function WidgetAction(props: WidgetActionProps): React_2.JSX.Element;
diff --git a/common/api/components-react.api.md b/common/api/components-react.api.md
index a8c302fbc09..71dbcd30f9d 100644
--- a/common/api/components-react.api.md
+++ b/common/api/components-react.api.md
@@ -2780,7 +2780,7 @@ export interface ToolbarButtonItemProps extends CommonProps {
 // @public @deprecated
 export type ToolbarItem = ActionButton | GroupButton | CustomToolbarItem;
 
-// @public
+// @public @deprecated
 export enum ToolbarOpacitySetting {
     Defaults = 0,
     Proximity = 1,
diff --git a/common/api/summary/appui-react.exports.csv b/common/api/summary/appui-react.exports.csv
index 1eac4df3279..f45b91d4083 100644
--- a/common/api/summary/appui-react.exports.csv
+++ b/common/api/summary/appui-react.exports.csv
@@ -682,6 +682,7 @@ public;function;ToolAssistanceField
 public;interface;ToolAssistanceFieldProps
 beta;function;Toolbar
 public;const;TOOLBAR_OPACITY_DEFAULT
+deprecated;const;TOOLBAR_OPACITY_DEFAULT
 public;interface;ToolbarActionItem
 public;class;ToolbarButtonHelper
 public;function;ToolbarComposer
@@ -800,6 +801,7 @@ deprecated;interface;ViewToolWidgetComposerProps
 public;class;ViewUtilities
 public;interface;Widget
 public;const;WIDGET_OPACITY_DEFAULT
+deprecated;const;WIDGET_OPACITY_DEFAULT
 alpha;function;WidgetAction
 alpha;function;WidgetActions
 public;interface;WidgetConfig
diff --git a/common/api/summary/components-react.exports.csv b/common/api/summary/components-react.exports.csv
index df937977086..12b89d63191 100644
--- a/common/api/summary/components-react.exports.csv
+++ b/common/api/summary/components-react.exports.csv
@@ -417,6 +417,7 @@ public;interface;ToolbarButtonItemProps
 public;type;ToolbarItem
 deprecated;type;ToolbarItem
 public;enum;ToolbarOpacitySetting
+deprecated;enum;ToolbarOpacitySetting
 public;enum;ToolbarPanelAlignment
 public;const;ToolbarPopupAutoHideContext
 public;const;ToolbarPopupContext
diff --git a/docs/storybook/src/frontstage/ConfigurableUiContent.stories.tsx b/docs/storybook/src/frontstage/ConfigurableUiContent.stories.tsx
index 8ea9128049d..4c4d5d4c30b 100644
--- a/docs/storybook/src/frontstage/ConfigurableUiContent.stories.tsx
+++ b/docs/storybook/src/frontstage/ConfigurableUiContent.stories.tsx
@@ -91,7 +91,8 @@ export const Default: Story = {
   },
 };
 
-export const SemiTransparentWidgets: Story = {
+export const TransparentWidgets: Story = {
+  name: "Transparent Widgets (deprecated)",
   args: {
     widgetOpacity: 0.5,
   },
diff --git a/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx b/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx
index 525be2440aa..a9ac0523cef 100644
--- a/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx
+++ b/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx
@@ -73,7 +73,9 @@ export interface ConfigurableUiContentProps extends CommonProps {
    * @deprecated in 4.16.0. View overlay visibility should be controlled by the components used in {@link ContentProps.content}.
    */
   viewOverlay?: boolean;
-  /** Describes the opacity of widgets. Uses redux store as a fallback. Defaults to {@link WIDGET_OPACITY_DEFAULT}. */
+  /** Describes the opacity of widgets. Uses redux store as a fallback. Defaults to {@link WIDGET_OPACITY_DEFAULT}.
+   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   */
   widgetOpacity?: number;
   /** Controls if the widget icons should be displayed. Uses redux store as a fallback. Defaults to `true`. */
   widgetIcon?: boolean;
@@ -85,7 +87,9 @@ export interface ConfigurableUiContentProps extends CommonProps {
   animateToolSettings?: boolean;
   /** Controls if the tool settings label should be set based on activated tool. Uses redux store as a fallback. Defaults to `false`. */
   toolAsToolSettingsLabel?: boolean;
-  /** Describes the opacity of toolbars. Uses redux store as a fallback. Defaults to {@link TOOLBAR_OPACITY_DEFAULT}. */
+  /** Describes the opacity of toolbars. Uses redux store as a fallback. Defaults to {@link TOOLBAR_OPACITY_DEFAULT}.
+   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   */
   toolbarOpacity?: number;
   /** Component to wrap all popout widgets and other child windows opened via {@link UiFramework.childWindows}. */
   childWindow?: React.ComponentType;
@@ -169,7 +173,9 @@ export function StandardLayout(props: StandardLayoutProps) {
   const context = React.useContext(ConfigurableUiContext);
   const {
     appBackstage,
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     widgetOpacity,
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacity,
     idleTimeout,
     intervalTimeout,
@@ -266,6 +272,7 @@ function useWidgetOpacity(
     // eslint-disable-next-line @typescript-eslint/no-deprecated
     return state?.configurableUiState.widgetOpacity;
   });
+  // eslint-disable-next-line @typescript-eslint/no-deprecated
   const opacity = widgetOpacity ?? reduxWidgetOpacity ?? WIDGET_OPACITY_DEFAULT;
 
   React.useEffect(() => {
@@ -292,6 +299,7 @@ function useToolbarOpacity(
   });
 
   const opacity =
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacity ?? reduxToolbarOpacity ?? TOOLBAR_OPACITY_DEFAULT;
 
   React.useEffect(() => {
diff --git a/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts b/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts
index f797e2d5672..036a08b8667 100644
--- a/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts
+++ b/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts
@@ -30,7 +30,9 @@ export interface FrameworkVisibility {
    */
   useProximityOpacity: boolean;
 
-  /** Determines whether the opacity of a toolbar should change immediately when the mouse gets close. Defaults to `false`. */
+  /** Determines whether the opacity of a toolbar should change immediately when the mouse gets close. Defaults to `false`.
+   * @deprecated in 5.35.0. Do not customize and rely on default configuration.
+   */
   snapWidgetOpacity: boolean;
 
   /** Handler for when a Frontstage is ready */
diff --git a/ui/appui-react/src/appui-react/popup/CardPopup.tsx b/ui/appui-react/src/appui-react/popup/CardPopup.tsx
index ac15afb261f..71927a16812 100644
--- a/ui/appui-react/src/appui-react/popup/CardPopup.tsx
+++ b/ui/appui-react/src/appui-react/popup/CardPopup.tsx
@@ -184,6 +184,7 @@ export function Card(props: CardProps) {
             panelAlignment={ToolbarPanelAlignment.Start}
             items={props.items}
             useDragInteraction={true}
+            // eslint-disable-next-line @typescript-eslint/no-deprecated
             toolbarOpacitySetting={ToolbarOpacitySetting.Transparent}
             onItemExecuted={props.onItemExecuted}
           />
diff --git a/ui/appui-react/src/appui-react/popup/ToolbarPopup.tsx b/ui/appui-react/src/appui-react/popup/ToolbarPopup.tsx
index 5354c8d174d..7132dd575c4 100644
--- a/ui/appui-react/src/appui-react/popup/ToolbarPopup.tsx
+++ b/ui/appui-react/src/appui-react/popup/ToolbarPopup.tsx
@@ -121,6 +121,7 @@ export class ToolbarPopup extends React.PureComponent<
               panelAlignment={ToolbarPanelAlignment.Start}
               items={this.props.items}
               useDragInteraction={true}
+              // eslint-disable-next-line @typescript-eslint/no-deprecated
               toolbarOpacitySetting={ToolbarOpacitySetting.Defaults}
               onItemExecuted={this.props.onItemExecuted}
             />
diff --git a/ui/appui-react/src/appui-react/theme/ThemeId.ts b/ui/appui-react/src/appui-react/theme/ThemeId.ts
index 041a576eecc..0fb6e9a873b 100644
--- a/ui/appui-react/src/appui-react/theme/ThemeId.ts
+++ b/ui/appui-react/src/appui-react/theme/ThemeId.ts
@@ -38,11 +38,13 @@ export enum ColorTheme {
 export type ThemeId = `${ColorTheme}` | (string & {});
 
 /** The default widget opacity.
+ * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
  * @public
  */
 export const WIDGET_OPACITY_DEFAULT = 1;
 
 /** The default widget opacity.
+ * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
  * @public
  */
 export const TOOLBAR_OPACITY_DEFAULT = 0.5;
diff --git a/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx b/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx
index b8d993299fe..a4408f9c785 100644
--- a/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx
+++ b/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx
@@ -38,7 +38,10 @@ export interface ToolbarProps extends CommonProps, NoChildrenProps {
   panelAlignment?: ToolbarPanelAlignment;
   /** Use drag interaction to open popups with nested toolbar buttons. */
   useDragInteraction?: boolean;
-  /** Determines whether to use mouse proximity to alter the opacity of the toolbar */
+  /** Determines whether to use mouse proximity to alter the opacity of the toolbar.
+   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   */
+  // eslint-disable-next-line @typescript-eslint/no-deprecated
   toolbarOpacitySetting?: ToolbarOpacitySetting;
   /** Optional function to call on any item execution */
   onItemExecuted?: OnItemExecutedFunc;
diff --git a/ui/appui-react/src/appui-react/toolbar/ToolbarComposer.tsx b/ui/appui-react/src/appui-react/toolbar/ToolbarComposer.tsx
index 568b72ad53a..fda3ad7e277 100644
--- a/ui/appui-react/src/appui-react/toolbar/ToolbarComposer.tsx
+++ b/ui/appui-react/src/appui-react/toolbar/ToolbarComposer.tsx
@@ -173,11 +173,13 @@ const useProximityOpacitySetting = () => {
 
 const useSnapWidgetOpacitySetting = () => {
   const [snapWidgetOpacity, setSnapWidgetOpacity] = React.useState(
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     UiFramework.visibility.snapWidgetOpacity
   );
 
   React.useEffect(() => {
     UiFramework.onUiVisibilityChanged.addListener(() =>
+      // eslint-disable-next-line @typescript-eslint/no-deprecated
       setSnapWidgetOpacity(UiFramework.visibility.snapWidgetOpacity)
     );
   }, []);
@@ -245,11 +247,14 @@ export function ToolbarComposer(props: ExtensibleToolbarProps) {
       panelAlignment={panelAlignment}
       items={items}
       useDragInteraction={isDragEnabled}
+      // eslint-disable-next-line @typescript-eslint/no-deprecated
       toolbarOpacitySetting={
         (useProximityOpacity || snapWidgetOpacity) &&
         !ProcessDetector.isMobileBrowser
-          ? ToolbarOpacitySetting.Proximity
-          : ToolbarOpacitySetting.Defaults
+          ? // eslint-disable-next-line @typescript-eslint/no-deprecated
+            ToolbarOpacitySetting.Proximity
+          : // eslint-disable-next-line @typescript-eslint/no-deprecated
+            ToolbarOpacitySetting.Defaults
       }
     />
   );
diff --git a/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx b/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx
index e40940a339e..47eb15d566b 100644
--- a/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx
+++ b/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx
@@ -32,7 +32,10 @@ export interface ToolbarWithOverflowProps extends CommonProps, NoChildrenProps {
   panelAlignment?: ToolbarPanelAlignment;
   /** Use Drag Interaction to open popups with nest action buttons */
   useDragInteraction?: boolean;
-  /** Determines whether to use mouse proximity to alter the opacity of the toolbar */
+  /** Determines whether to use mouse proximity to alter the opacity of the toolbar.
+   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   */
+  // eslint-disable-next-line @typescript-eslint/no-deprecated
   toolbarOpacitySetting?: ToolbarOpacitySetting;
   /** Optional function to call on any item execution */
   onItemExecuted?: OnItemExecutedFunc;
diff --git a/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.tsx b/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.tsx
index 0a8d4ba0cb2..aaa36a1cca5 100644
--- a/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.tsx
+++ b/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.tsx
@@ -38,6 +38,7 @@ export const Surface = React.forwardRef<HTMLDivElement, SurfaceProps>(
 
     const calculateOpacity = useConditionalValue(() => {
       if (ProcessDetector.isMobileBrowser) return false;
+      // eslint-disable-next-line @typescript-eslint/no-deprecated
       if (UiFramework.visibility.snapWidgetOpacity) return true;
       return false;
     }, [SyncUiEventId.ShowHideManagerSettingChange]);
diff --git a/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts b/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
index 8b3a6eea0d3..02fd32c061b 100644
--- a/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
+++ b/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
@@ -24,12 +24,14 @@ import { ConfigurableUiActionId } from "../redux/ConfigurableUiState.js";
 export interface InitialAppUiSettings {
   colorTheme: ThemeId;
   dragInteraction: boolean;
+  /** @deprecated in 5.35.0. Do not customize and rely on default opacity configuration. */
   widgetOpacity: number;
   showWidgetIcon?: boolean;
   /** @alpha */
   autoCollapseUnpinnedPanels?: boolean;
   animateToolSettings?: boolean;
   useToolAsToolSettingsLabel?: boolean;
+  /** @deprecated in 5.35.0. Do not customize and rely on default opacity configuration. */
   toolbarOpacity: number;
 }
 
diff --git a/ui/appui-react/src/appui-react/widgets/NavigationWidgetComposer.tsx b/ui/appui-react/src/appui-react/widgets/NavigationWidgetComposer.tsx
index a7cfcb18513..1d990c2cb76 100644
--- a/ui/appui-react/src/appui-react/widgets/NavigationWidgetComposer.tsx
+++ b/ui/appui-react/src/appui-react/widgets/NavigationWidgetComposer.tsx
@@ -152,6 +152,7 @@ export function NavigationAidHost(props: NavigationAidHostProps) {
 
   if (
     (UiFramework.visibility.useProximityOpacity || // eslint-disable-line @typescript-eslint/no-deprecated
+      // eslint-disable-next-line @typescript-eslint/no-deprecated
       UiFramework.visibility.snapWidgetOpacity) &&
     !ProcessDetector.isMobileBrowser
   ) {
@@ -232,6 +233,7 @@ export function NavigationWidgetComposer(props: NavigationWidgetComposerProps) {
   const [elementSet] = React.useState(new WidgetElementSet());
   const proximityScale = useProximityToMouse(
     elementSet,
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     UiFramework.visibility.snapWidgetOpacity
   );
   const uiIsVisible = useUiVisibility();
diff --git a/ui/appui-react/src/appui-react/widgets/ToolWidgetComposer.tsx b/ui/appui-react/src/appui-react/widgets/ToolWidgetComposer.tsx
index 72d694883b5..47bd1845b1f 100644
--- a/ui/appui-react/src/appui-react/widgets/ToolWidgetComposer.tsx
+++ b/ui/appui-react/src/appui-react/widgets/ToolWidgetComposer.tsx
@@ -44,6 +44,7 @@ export function ToolWidgetComposer(props: ToolWidgetComposerProps) {
   const [elementSet] = React.useState(new WidgetElementSet());
   const proximityScale = useProximityToMouse(
     elementSet,
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     UiFramework.visibility.snapWidgetOpacity
   );
   const uiIsVisible = useUiVisibility();
diff --git a/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx b/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx
index 9a470bb48d3..79013fbf570 100644
--- a/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx
+++ b/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx
@@ -109,6 +109,7 @@ export enum ToolbarPanelAlignment {
 }
 
 /** Enumeration of Toolbar Opacity setting.
+ * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
  * @public
  */
 export enum ToolbarOpacitySetting {
@@ -148,6 +149,7 @@ export interface ToolbarOverflowContextProps {
   readonly overflowDirection: OrthogonalDirection;
   readonly panelAlignment: ToolbarPanelAlignment;
   readonly useDragInteraction: boolean;
+  // eslint-disable-next-line @typescript-eslint/no-deprecated
   readonly toolbarOpacitySetting: ToolbarOpacitySetting;
   readonly openPopupCount: number;
   readonly onPopupPanelOpenClose: (isOpening: boolean) => void;
@@ -168,6 +170,7 @@ export const ToolbarWithOverflowDirectionContext =
     overflowDirection: OrthogonalDirection.Vertical,
     panelAlignment: ToolbarPanelAlignment.Start,
     useDragInteraction: false,
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacitySetting: ToolbarOpacitySetting.Proximity,
     openPopupCount: 0,
     onPopupPanelOpenClose: (_isOpening: boolean) => {},
@@ -426,6 +429,7 @@ export interface InternalToolbarComponentProps
   /** Use Drag Interaction to open popups with nest action buttons. */
   useDragInteraction?: boolean;
   /** Determines whether to use mouse proximity to alter the opacity of the toolbar. */
+  // eslint-disable-next-line @typescript-eslint/no-deprecated
   toolbarOpacitySetting?: ToolbarOpacitySetting;
   /** Optional function to call on any item execution. */
   onItemExecuted?: OnItemExecutedFunc;
@@ -622,6 +626,7 @@ export function InternalToolbarComponent(props: InternalToolbarComponentProps) {
         panelAlignment,
         useDragInteraction,
         toolbarOpacitySetting:
+          // eslint-disable-next-line @typescript-eslint/no-deprecated
           props.toolbarOpacitySetting ?? ToolbarOpacitySetting.Proximity,
         overflowDirection:
           direction === OrthogonalDirection.Horizontal
diff --git a/ui/components-react/src/components-react/toolbar/Items.tsx b/ui/components-react/src/components-react/toolbar/Items.tsx
index 587f52dc673..3be50c7c12c 100644
--- a/ui/components-react/src/components-react/toolbar/Items.tsx
+++ b/ui/components-react/src/components-react/toolbar/Items.tsx
@@ -46,6 +46,7 @@ export function ToolbarItems(props: ToolbarItemsProps) {
   const { toolbarOpacitySetting, openPopupCount, overflowDisplayActive } =
     useToolbarWithOverflowDirectionContext();
   const useTransparentBackground =
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacitySetting === ToolbarOpacitySetting.Transparent;
 
   let toolbarOpacity = useTransparentBackground
@@ -62,11 +63,13 @@ export function ToolbarItems(props: ToolbarItemsProps) {
     ? 0
     : TOOLBAR_BACKDROP_FILTER_BLUR_DEFAULT;
   let showSeparators =
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacitySetting === ToolbarOpacitySetting.Transparent ? false : true;
 
   const { ref, proximityScale } = useWidgetOpacityContext<HTMLDivElement>();
 
   if (
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacitySetting === ToolbarOpacitySetting.Proximity &&
     openPopupCount < 1 &&
     !overflowDisplayActive
diff --git a/ui/components-react/src/components-react/toolbar/OverflowPanel.tsx b/ui/components-react/src/components-react/toolbar/OverflowPanel.tsx
index 3e7f987ed93..44d69ced24f 100644
--- a/ui/components-react/src/components-react/toolbar/OverflowPanel.tsx
+++ b/ui/components-react/src/components-react/toolbar/OverflowPanel.tsx
@@ -56,6 +56,7 @@ export function ToolbarOverflowPanel(props: ToolbarOverflowPanelProps) {
   const { proximityScale } = useWidgetOpacityContext();
 
   const useTransparentBackground =
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacitySetting === ToolbarOpacitySetting.Transparent;
   let toolbarOpacity = useTransparentBackground ? 0 : TOOLBAR_OPACITY_DEFAULT;
   let boxShadowOpacity = useTransparentBackground
@@ -65,9 +66,11 @@ export function ToolbarOverflowPanel(props: ToolbarOverflowPanelProps) {
     ? 0
     : TOOLBAR_BACKDROP_FILTER_BLUR_DEFAULT;
   let showSeparators =
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacitySetting === ToolbarOpacitySetting.Transparent ? false : true;
 
   if (
+    // eslint-disable-next-line @typescript-eslint/no-deprecated
     toolbarOpacitySetting === ToolbarOpacitySetting.Proximity &&
     openPopupCount < 1 &&
     !overflowDisplayActive
diff --git a/ui/components-react/src/components-react/toolbar/Toolbar.tsx b/ui/components-react/src/components-react/toolbar/Toolbar.tsx
index 034a43ccef7..d1d40368c80 100644
--- a/ui/components-react/src/components-react/toolbar/Toolbar.tsx
+++ b/ui/components-react/src/components-react/toolbar/Toolbar.tsx
@@ -35,6 +35,7 @@ export interface ToolbarProps extends CommonProps, NoChildrenProps {
   /** Use Drag Interaction to open popups with nest action buttons */
   useDragInteraction?: boolean;
   /** Determines whether to use mouse proximity to alter the opacity of the toolbar */
+  // eslint-disable-next-line @typescript-eslint/no-deprecated
   toolbarOpacitySetting?: ToolbarOpacitySetting;
   /** Optional function to call on any item execution */
   onItemExecuted?: OnItemExecutedFunc;
diff --git a/ui/components-react/src/components-react/toolbar/ToolbarWithOverflow.tsx b/ui/components-react/src/components-react/toolbar/ToolbarWithOverflow.tsx
index c28bca3a03a..a1203d2753a 100644
--- a/ui/components-react/src/components-react/toolbar/ToolbarWithOverflow.tsx
+++ b/ui/components-react/src/components-react/toolbar/ToolbarWithOverflow.tsx
@@ -37,6 +37,7 @@ export interface ToolbarWithOverflowProps extends CommonProps, NoChildrenProps {
   /** Use Drag Interaction to open popups with nest action buttons */
   useDragInteraction?: boolean;
   /** Determines whether to use mouse proximity to alter the opacity of the toolbar */
+  // eslint-disable-next-line @typescript-eslint/no-deprecated
   toolbarOpacitySetting?: ToolbarOpacitySetting;
   /** Optional function to call on any item execution */
   onItemExecuted?: OnItemExecutedFunc;

From 13458042b8050b6b21d0875df81fa57ca3cfc16d Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 11:47:04 +0300
Subject: [PATCH 04/12] Remove test-app defaults

---
 apps/test-app/src/frontend/AppInitializer.tsx | 2 --
 1 file changed, 2 deletions(-)

diff --git a/apps/test-app/src/frontend/AppInitializer.tsx b/apps/test-app/src/frontend/AppInitializer.tsx
index 13292832fd3..867414ddc72 100644
--- a/apps/test-app/src/frontend/AppInitializer.tsx
+++ b/apps/test-app/src/frontend/AppInitializer.tsx
@@ -161,10 +161,8 @@ function createInitializer() {
       new AppUiSettings({
         colorTheme: lastTheme ?? SYSTEM_PREFERRED_COLOR_THEME,
         dragInteraction: false,
-        widgetOpacity: 0.8,
         showWidgetIcon: true,
         autoCollapseUnpinnedPanels: false,
-        toolbarOpacity: 0.5,
       })
     );
 

From 4fdf491b406eb3fcd11927dd77a0ff9ccc36c400 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 12:02:25 +0300
Subject: [PATCH 05/12] Remove glass effect

---
 .../src/appui-react/toolbar/new-toolbars/Surface.scss      | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.scss b/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.scss
index 6622ccfc06b..65b7f654aad 100644
--- a/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.scss
+++ b/ui/appui-react/src/appui-react/toolbar/new-toolbars/Surface.scss
@@ -15,12 +15,7 @@
   // TODO: fixes an issues on Safari where borders and backgrounds are overlapped by the viewport.
   position: relative;
 
-  @supports (backdrop-filter: blur(5px)) {
-    background-color: hsl(
-      var(--iui-color-background-hsl) / var(--iui-opacity-2)
-    );
-    backdrop-filter: blur(5px);
-  }
+  background-color: var(--iui-color-background);
 
   &.uifw-vertical {
     flex-direction: column;

From e95d22904d3cbb4a951ccd615d1371c74a93ae08 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 12:16:23 +0300
Subject: [PATCH 06/12] Reword deprecation message

---
 .../src/appui-react/configurableui/ConfigurableUiContent.tsx  | 4 ++--
 .../src/appui-react/framework/FrameworkVisibility.ts          | 2 +-
 ui/appui-react/src/appui-react/theme/ThemeId.ts               | 4 ++--
 ui/appui-react/src/appui-react/toolbar/Toolbar.tsx            | 2 +-
 .../src/appui-react/toolbar/ToolbarWithOverflow.tsx           | 2 +-
 ui/appui-react/src/appui-react/uistate/AppUiSettings.ts       | 4 ++--
 .../src/components-react/toolbar/InternalToolbarComponent.tsx | 2 +-
 7 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx b/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx
index a9ac0523cef..878079f4721 100644
--- a/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx
+++ b/ui/appui-react/src/appui-react/configurableui/ConfigurableUiContent.tsx
@@ -74,7 +74,7 @@ export interface ConfigurableUiContentProps extends CommonProps {
    */
   viewOverlay?: boolean;
   /** Describes the opacity of widgets. Uses redux store as a fallback. Defaults to {@link WIDGET_OPACITY_DEFAULT}.
-   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   * @deprecated in 5.35.0. Use the default configuration.
    */
   widgetOpacity?: number;
   /** Controls if the widget icons should be displayed. Uses redux store as a fallback. Defaults to `true`. */
@@ -88,7 +88,7 @@ export interface ConfigurableUiContentProps extends CommonProps {
   /** Controls if the tool settings label should be set based on activated tool. Uses redux store as a fallback. Defaults to `false`. */
   toolAsToolSettingsLabel?: boolean;
   /** Describes the opacity of toolbars. Uses redux store as a fallback. Defaults to {@link TOOLBAR_OPACITY_DEFAULT}.
-   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   * @deprecated in 5.35.0. Use the default configuration.
    */
   toolbarOpacity?: number;
   /** Component to wrap all popout widgets and other child windows opened via {@link UiFramework.childWindows}. */
diff --git a/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts b/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts
index 036a08b8667..a30f4ca1e3e 100644
--- a/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts
+++ b/ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts
@@ -31,7 +31,7 @@ export interface FrameworkVisibility {
   useProximityOpacity: boolean;
 
   /** Determines whether the opacity of a toolbar should change immediately when the mouse gets close. Defaults to `false`.
-   * @deprecated in 5.35.0. Do not customize and rely on default configuration.
+   * @deprecated in 5.35.0. Use the default configuration.
    */
   snapWidgetOpacity: boolean;
 
diff --git a/ui/appui-react/src/appui-react/theme/ThemeId.ts b/ui/appui-react/src/appui-react/theme/ThemeId.ts
index 0fb6e9a873b..76f4e7f3e7b 100644
--- a/ui/appui-react/src/appui-react/theme/ThemeId.ts
+++ b/ui/appui-react/src/appui-react/theme/ThemeId.ts
@@ -38,13 +38,13 @@ export enum ColorTheme {
 export type ThemeId = `${ColorTheme}` | (string & {});
 
 /** The default widget opacity.
- * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+ * @deprecated in 5.35.0. Use the default configuration.
  * @public
  */
 export const WIDGET_OPACITY_DEFAULT = 1;
 
 /** The default widget opacity.
- * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+ * @deprecated in 5.35.0. Use the default configuration.
  * @public
  */
 export const TOOLBAR_OPACITY_DEFAULT = 0.5;
diff --git a/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx b/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx
index a4408f9c785..021aa4b8d66 100644
--- a/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx
+++ b/ui/appui-react/src/appui-react/toolbar/Toolbar.tsx
@@ -39,7 +39,7 @@ export interface ToolbarProps extends CommonProps, NoChildrenProps {
   /** Use drag interaction to open popups with nested toolbar buttons. */
   useDragInteraction?: boolean;
   /** Determines whether to use mouse proximity to alter the opacity of the toolbar.
-   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   * @deprecated in 5.35.0. Use the default configuration.
    */
   // eslint-disable-next-line @typescript-eslint/no-deprecated
   toolbarOpacitySetting?: ToolbarOpacitySetting;
diff --git a/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx b/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx
index 47eb15d566b..64c57789853 100644
--- a/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx
+++ b/ui/appui-react/src/appui-react/toolbar/ToolbarWithOverflow.tsx
@@ -33,7 +33,7 @@ export interface ToolbarWithOverflowProps extends CommonProps, NoChildrenProps {
   /** Use Drag Interaction to open popups with nest action buttons */
   useDragInteraction?: boolean;
   /** Determines whether to use mouse proximity to alter the opacity of the toolbar.
-   * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+   * @deprecated in 5.35.0. Use the default configuration.
    */
   // eslint-disable-next-line @typescript-eslint/no-deprecated
   toolbarOpacitySetting?: ToolbarOpacitySetting;
diff --git a/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts b/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
index 02fd32c061b..6b3b36af8f5 100644
--- a/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
+++ b/ui/appui-react/src/appui-react/uistate/AppUiSettings.ts
@@ -24,14 +24,14 @@ import { ConfigurableUiActionId } from "../redux/ConfigurableUiState.js";
 export interface InitialAppUiSettings {
   colorTheme: ThemeId;
   dragInteraction: boolean;
-  /** @deprecated in 5.35.0. Do not customize and rely on default opacity configuration. */
+  /** @deprecated in 5.35.0. Use the default configuration. */
   widgetOpacity: number;
   showWidgetIcon?: boolean;
   /** @alpha */
   autoCollapseUnpinnedPanels?: boolean;
   animateToolSettings?: boolean;
   useToolAsToolSettingsLabel?: boolean;
-  /** @deprecated in 5.35.0. Do not customize and rely on default opacity configuration. */
+  /** @deprecated in 5.35.0. Use the default configuration. */
   toolbarOpacity: number;
 }
 
diff --git a/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx b/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx
index 79013fbf570..94a2373430b 100644
--- a/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx
+++ b/ui/components-react/src/components-react/toolbar/InternalToolbarComponent.tsx
@@ -109,7 +109,7 @@ export enum ToolbarPanelAlignment {
 }
 
 /** Enumeration of Toolbar Opacity setting.
- * @deprecated in 5.35.0. Do not customize and rely on default opacity configuration.
+ * @deprecated in 5.35.0. Use the default configuration.
  * @public
  */
 export enum ToolbarOpacitySetting {

From 837a8c49983bcd2fb49db8caa2ce29113e913512 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 12:24:16 +0300
Subject: [PATCH 07/12] pnpm changeset

---
 .changeset/four-toys-think.md    | 12 ++++++++++++
 .changeset/full-cloths-wait.md   |  5 +++++
 .changeset/humble-loops-brake.md |  5 +++++
 .changeset/khaki-candles-grab.md |  5 +++++
 .changeset/young-roses-try.md    |  5 +++++
 5 files changed, 32 insertions(+)
 create mode 100644 .changeset/four-toys-think.md
 create mode 100644 .changeset/full-cloths-wait.md
 create mode 100644 .changeset/humble-loops-brake.md
 create mode 100644 .changeset/khaki-candles-grab.md
 create mode 100644 .changeset/young-roses-try.md

diff --git a/.changeset/four-toys-think.md b/.changeset/four-toys-think.md
new file mode 100644
index 00000000000..03313767213
--- /dev/null
+++ b/.changeset/four-toys-think.md
@@ -0,0 +1,12 @@
+---
+"@itwin/core-react": minor
+---
+
+Deprecated toolbar and widget opacity APIs.
+
+- `toolbarOpacity` and `widgetOpacity` props of `ConfigurableUiContent` component.
+- `snapWidgetOpacity` property of `FrameworkVisibility` interface.
+- `TOOLBAR_OPACITY_DEFAULT` and `WIDGET_OPACITY_DEFAULT` constants.
+- `toolbarOpacitySetting` prop of `Toolbar` and `ToolbarWithOverflow` components.
+
+Use the default configuration instead.
diff --git a/.changeset/full-cloths-wait.md b/.changeset/full-cloths-wait.md
new file mode 100644
index 00000000000..2a388a3fe1e
--- /dev/null
+++ b/.changeset/full-cloths-wait.md
@@ -0,0 +1,5 @@
+---
+"@itwin/appui-react": minor
+---
+
+Removed the glass styling effect from `Toolbar` component.
diff --git a/.changeset/humble-loops-brake.md b/.changeset/humble-loops-brake.md
new file mode 100644
index 00000000000..2ea8cd48b16
--- /dev/null
+++ b/.changeset/humble-loops-brake.md
@@ -0,0 +1,5 @@
+---
+"@itwin/appui-react": minor
+---
+
+Invalidated the settings stored via the deprecated `AppUiSettings` class.
diff --git a/.changeset/khaki-candles-grab.md b/.changeset/khaki-candles-grab.md
new file mode 100644
index 00000000000..a70949c6c69
--- /dev/null
+++ b/.changeset/khaki-candles-grab.md
@@ -0,0 +1,5 @@
+---
+"@itwin/components-react": minor
+---
+
+Deprecated `ToolbarOpacitySetting` enum. Use the default configuration instead.
diff --git a/.changeset/young-roses-try.md b/.changeset/young-roses-try.md
new file mode 100644
index 00000000000..4193902d387
--- /dev/null
+++ b/.changeset/young-roses-try.md
@@ -0,0 +1,5 @@
+---
+"@itwin/appui-react": minor
+---
+
+Changed the default widget opacity to `1`.

From f9b742302e296f7e27dfe6d886c6dcfb6202e326 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 12:40:02 +0300
Subject: [PATCH 08/12] npm run extract-api

---
 common/api/appui-react.api.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/common/api/appui-react.api.md b/common/api/appui-react.api.md
index 35471eb251e..5b2930a88be 100644
--- a/common/api/appui-react.api.md
+++ b/common/api/appui-react.api.md
@@ -3909,7 +3909,7 @@ export const SessionStateActions: {
     setNumItemsSelected: (numSelected: number) => ActionWithPayload<SessionStateActionId.SetNumItemsSelected, number>;
     setIModelConnection: (iModelConnection: any) => ActionWithPayload<SessionStateActionId.SetIModelConnection, any>;
     setSelectionScope: (activeSelectionScope: string) => ActionWithPayload<SessionStateActionId.SetSelectionScope, string>;
-    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuPayload> | DeepReadonlyObject<CursorMenuData>>;
+    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuData> | DeepReadonlyObject<CursorMenuPayload>>;
 };
 
 // @beta @deprecated
@@ -3947,7 +3947,7 @@ export const sessionStateMapDispatchToProps: {
     setNumItemsSelected: (numSelected: number) => ActionWithPayload<SessionStateActionId.SetNumItemsSelected, number>;
     setIModelConnection: (iModelConnection: any) => ActionWithPayload<SessionStateActionId.SetIModelConnection, any>;
     setSelectionScope: (activeSelectionScope: string) => ActionWithPayload<SessionStateActionId.SetSelectionScope, string>;
-    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuPayload> | DeepReadonlyObject<CursorMenuData>>;
+    updateCursorMenu: (cursorMenuData: CursorMenuData | CursorMenuPayload) => ActionWithPayload<SessionStateActionId.UpdateCursorMenu, DeepReadonlyObject<CursorMenuData> | DeepReadonlyObject<CursorMenuPayload>>;
 };
 
 // @public @deprecated
@@ -5426,7 +5426,7 @@ export function useUiStateStorageHandler(): UiStateStorage;
 // @public
 export function useWidget(): {
     state: WidgetState;
-    widgetLocation: "popout" | "floating" | "docked";
+    widgetLocation: "popout" | "docked" | "floating";
     setState: (widgetState: Omit<WidgetState, WidgetState.Floating>) => void;
 };
 

From 4f8851ae00b42bff0133f964470ea7655371d3b4 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 12:41:03 +0300
Subject: [PATCH 09/12] Fix unit test

---
 ui/appui-react/src/test/settings/UiSettingsPage.test.tsx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ui/appui-react/src/test/settings/UiSettingsPage.test.tsx b/ui/appui-react/src/test/settings/UiSettingsPage.test.tsx
index 60bb2d45cb4..4d0c197d130 100644
--- a/ui/appui-react/src/test/settings/UiSettingsPage.test.tsx
+++ b/ui/appui-react/src/test/settings/UiSettingsPage.test.tsx
@@ -86,8 +86,8 @@ describe("UiSettingsPage", () => {
     const wrapper = render(<UiSettingsPage />);
     const thumb = wrapper.getAllByRole("slider")[1];
 
-    expect(UiFramework.getWidgetOpacity()).toEqual(0.9);
-    expect(thumb.getAttribute("aria-valuenow")).toEqual("0.9");
+    expect(UiFramework.getWidgetOpacity()).toEqual(1);
+    expect(thumb.getAttribute("aria-valuenow")).toEqual("1");
 
     act(() => {
       UiFramework.setWidgetOpacity(0.5);

From 407c6534dad1e370fbe29c949b89cdf05c736785 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 12:51:28 +0300
Subject: [PATCH 10/12] Update snap

---
 ...avigation-widget-test-1-chromium-linux.png | Bin 5926 -> 6363 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)

diff --git a/e2e-tests/tests/widget/basic-navigation-widget.test.ts-snapshots/basic-navigation-widget-test-1-chromium-linux.png b/e2e-tests/tests/widget/basic-navigation-widget.test.ts-snapshots/basic-navigation-widget-test-1-chromium-linux.png
index 97bc5e64a22f9216dfbe920bb63de30c9b380445..9c362865e266e69a31d6ddc86c788e1d2091cfe9 100644
GIT binary patch
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From 8a03cf7b7b6c6ad496aff9da48c99fe9b56f95ea Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 16:17:24 +0300
Subject: [PATCH 11/12] Fix changeset

---
 .changeset/four-toys-think.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.changeset/four-toys-think.md b/.changeset/four-toys-think.md
index 03313767213..a72e15a1288 100644
--- a/.changeset/four-toys-think.md
+++ b/.changeset/four-toys-think.md
@@ -1,5 +1,5 @@
 ---
-"@itwin/core-react": minor
+"@itwin/appui-react": minor
 ---
 
 Deprecated toolbar and widget opacity APIs.

From 753c13693b82f416f9252ead5c28e9f33421c236 Mon Sep 17 00:00:00 2001
From: GerardasB <10091419+GerardasB@users.noreply.github.com>
Date: Wed, 9 Sep 2026 16:53:08 +0300
Subject: [PATCH 12/12] Changeset for core-react

---
 .changeset/young-roses-try.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.changeset/young-roses-try.md b/.changeset/young-roses-try.md
index 4193902d387..4b004948718 100644
--- a/.changeset/young-roses-try.md
+++ b/.changeset/young-roses-try.md
@@ -1,5 +1,6 @@
 ---
 "@itwin/appui-react": minor
+"@itwin/core-react": minor
 ---
 
 Changed the default widget opacity to `1`.