Element "Stack" - multiply effect

[Danielku15]

• 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.

Is your feature request related to a problem? Please describe.
A very typical need in drawing architectural diagrams is that you want to indicate that one block is dynamically scaling, or multiple items exist. e.g. having many users, or a service which exists many times. Doing this in a clean consistent way is currently not easily possible in Draw.io and requires some workarounds.

Describe the solution you'd like
A new "effect" triggers a mechanism that the element is drawn in a typical stack fashion:

• Connectors would still go to the main element
• Visual aspects (how many duplicate draws, direction and angle could be configurable properties)

Describe alternatives you've considered

• In some cases I resort to separate annotations
• In some cases I just use the manual stacking with grouping (but its hard to properly maintain)
• In some cases I just add some multiplier labels like x100 in the box itself.

Additional context
This allows also AI agents to read the visual intent more semantically than relying on some guidance that "close overlapping stacked elements mean some kind of multiplicity/scaling".

[draw-io-triage-bot]

👋 Thank you for opening this issue!

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Summary: The user requests a built-in 'stack' or 'multiply' visual effect for shapes in draw.io that would render an element with stacked duplicates behind it to indicate multiplicity or scaling, while keeping connectors attached to the main element. Note: draw.io may already partially support this via the multiple=1 shape style property.

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📝 Additional Information Needed

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

• Have you explored using the existing 'Multiple' shape style property? In draw.io, some shapes support a style property like multiple=1 which renders the shape with a stacked/shadow effect behind it, similar to what you're describing. You can try editing the style of a shape (Edit > Edit Style) and adding multiple=1; to see if it meets your needs.
• If the existing multiple=1 style doesn't fully meet your needs, could you clarify what additional configurability you'd want beyond what it provides (e.g., number of stacked copies, direction, spacing)?

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[Danielku15]

The proposal sounded promising, but multiple=1 doesn't really work even in the simplest shapes like rectangles.

But even if it works, I'd like to have some level of customization like number of replicas draw+ direction and distance of them. This way multiple variations of multiplicity can be represented.

I would like a solution which works with at least the default shapes like General, Advanced, Basic, Arrows, Flowchart. Preferably it also works with any shape like also groups like C4, Azure, Cloud/Enterprise, Kubernetes etc.