How does UMG set overlapping layouts?

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You may need to explain better what the issue is. If you wanted to achieve what’s in the top image, use an overlay or canvas, or grid even.

use the grid panel set grid array slot colum and row
then place images and set sorting layer in details

How to specify the button in any position in the grid layout?

You’re setting Fill Rules for the grid panel; you generally may not even need them unless we’re after a more specific behaviour:

Instead, use the button’s Grid Slot to tell the button child which row / column it should occupy:

Also, your Designer is set to Fill Screen, consider working with Desired or Custom on Screen if you know the desired dimensions upfront.


You can also automate adding children to grid: