Bug Report Clipping a display capture: doesn't seem to work right


I have multiple monitors. I'm trying to capture a window that spans two monitors. A "window" capture works, but doesn't get the mouse, and has performance issues. So I'm trying to get two display captures to work, and crop them.

The target is an iMovie window.

My first thought was "crop to window", but that actually gives a "larger than a screen", full window size capture -- and half is blank (on the other screen).

My next thought was "manual". But attempting to clip off the top results in clipping off the bottom.

Testing all 4 slots shows that only bottom and right actually clip -- attempting to clip left or top clips right or bottom.