Don’t know if it is asked before, or possible, but it will be great if we can optionally customize the position of visible component on the screen 
Mit app inventor are already implementing something like this ,This is an old topic about it here:
Right now you can use my extension for this job It has set x,y, and z positions 
But right now it isn’t implemented yet in kodular/ app inventor, it would be great if it was one of its features 