Layer Cover

[Wyitherogue]

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

I would like a togglable feature for individual layers to cover other layers under them with the background color.

Additional context:
It would also be nice to be able to group layers into "folders" in the layers tab, which all are effected by things like visibility at the same time

[draw-io-triage-bot]

👋 Thank you for opening this issue!

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Summary: The user requests two layer-related features: (1) an option to make individual layers opaque so they cover/hide layers beneath them with the background color, and (2) the ability to group layers into folders for bulk visibility toggling.

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🔍 Possible Related Issues

This issue might be related to existing issues:

🟡 #4055 - Add pages management features
That issue discusses adding organizational abstractions (folders/grouping) on top of existing pages/layers, which is conceptually related to the 'layer folders' part of this request.

Please check if any of these address your issue. If this is a duplicate, we may close this issue and continue the conversation there.

📝 Additional Information Needed

To help us investigate this more effectively, could you please provide:

• Use case details: It would help to understand the specific workflow or scenario where opaque layers covering layers beneath them is needed. For example, is this for presentation purposes, or for working on isolated parts of a complex diagram?
• Examples or mockups: A visual example or mockup showing how the 'layer cover' behavior and 'layer folders' would look and function in the UI would help clarify the request.

We also have some questions:

• When you say 'cover other layers under them with the background color,' do you mean making a layer fully opaque so that it hides everything beneath it (like a solid backdrop), as opposed to the current transparent layering behavior?
• For the layer folder/grouping idea, would you expect nested folders, or just a single level of grouping? And would the grouped layers share only visibility toggling, or also other properties like lock state?
• Have you considered using the existing Tags feature as a partial workaround for grouping visibility of related elements across layers?

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_{🤖 This is an automated response to help with initial triage. A human maintainer will review this issue. If you've provided all the requested information, no further action is needed - we'll get back to you soon!}