Possibly I missed something, but I cannot to find any information how to create such windows as in image below.
To be clear, I know how to create GUI box in scene view in fixed position, but I want to know the way to make them flow to the bottom corner - autolayout and react to other windows if present. Is is possible to make?
Unity’s article on Designing UI for Multiple Resolutions gives an introduction to the essential concepts. Basically, to put something in the corner of the screen, use anchors.
“Reacting to other windows” is a bit vague. If you want the windows to stack on top of each other, one way to do that would be to put all of them inside of a Vertical Layout Group, and then activate/deactivate each window as appropriate. (You might find you need to call MarkLayoutForRebuild on the layout group after activating/deactivating its children; I’ve gotten some inconsistent results on whether Unity figures that out automatically.)
Sorry, I mean they know about each other. These two in the image comes from navmesh and visual graph and they are not in the same place, although they come from different components. Somehow they are both in the corner but stack on top fo each other. I want to add my own on top of them (or below), but when others are not present mine will be in the corner.