Hi, I absolutely love the Picture-in-Picture feature, and use it all the time since it became available.
One feature I am missing from it is the easier positioning and resizing by snapping to screen edges. I often move around the PIP window, and it's really hard to position near the edge (or corner) of the screen so that it doesn't stick out to the other monitor, nor has a gap to the screen edge.
When I use a two-monitor setup, I often want the picture to be displayed in fullscreen on the second one. I know I can double-click on it, but that feature doesn't always work well. Some time after going fullscreen it breaks and starts showing only partially on the screen, and partially off the screen, and it's then very hard to resize back to normal. Perhaps it has something to do with my laptop having two graphics cards, and switching between them on the fly. As a result I don't use the fullscreen feature, but I manually resize the picture to fill the whole screen (and set the wallpaper to solid black). This works best and never breaks, but is tedious to do every time the picture aspect ratio changes, or the PIP resets after I disconnect the second monitor. If the position and size of the PIP was snapping to the monitor edges, it would make this a lot easier.
If the PIP had profiles - sets of size/position, that could be stored, renamed, and quickly applied (a right-click menu), it would be even better, even without the snapping.
Thank you for all the work!