@sim, @jfperusse - may have been raised before but I wrote a landscape project with fixed dimensions ie no adjustment curve in the corner. After rotating the window is displaced showing some background and it has the partial white ellipse in the corner. This is in version 3 - Is there some command now which retains fixing the window to full screen dimensions or is this a bug ?
p.s. I have used calculated dimensions related to screen rotation and screen dimensions could that influence the flip for window size and mode.