How to draw overlapping graphic element using UILayout?

Hello everyone.
Are there any ways to draw a graphic element so that it overlaps another?
I accept any crazy ideas :crazy_face:
palette

I don’t understand what you mean and what you want to achieve

I want to repeat the pop, that I highlighted in the picture (look at the arrow).
this part is written in C ++, I want to do something similar using UILayout

If the triangle indicates on/off, why not use checkboxes (bool) in one row, just above the color patches ? Or align them vertically, and use checkboxes in one column, and colors in another.