I meant a screen grab of what you are seeing in FCPX, but this helps too.
[Robert Randolph] “Is there not an easier way to conform the project frame size to the clip (instead of the clip to the project?)”
But don’t you want to crop to the size of a window that is part of a larger piece of media? FCPX will not be able to analyze the window size and create a project to that size. FCPX only sees the larger, original recording. You need to tell it what size to make the Project that fits the desired window.
Can you send a full size exported still frame of the entire UI?