I could not find an idea/support item that matched, appologies if this has already been suggested.
Having the ability to change the layering of all my controls, labels & icons would be useful (like using the z-index in CSS). I find myself rethinking how I want my applicaiton to look, only to find out I must remove previously added content and then readd it in a different order.
To make my comment understandable, here is an example:
Let's say I want to add three coloured squares, icon1, icon2, icon3. The way that PowerApps seems to handle these in terms of z-index is the following:
icon1 = z-index:1
icon2 = z-index:2
icon3 = z-index:3
Now I want to add a icon4 (yellow triangle), by default it we be placed on z-index:4 on top of icon3 (blue square). Great, but I want the new icon to sit on top of icon1 (red square). I cannot reorder the layer at which these icons sit unless I deleted them all and add them in the order that I want.
Having a Z level option for all items would be useful.