I am totally new to video editing. I just need to correct, very slightly, a horizon. I have managed to rotate the image to compensate for the slight horizon misalignment, and, of course, have black background showing. I now want to crop the image to within the boundary of the black background parts that are showing. I select crop custom region (as shown in a couple of tutorials), but when the new cropping window opens, my image has been automatically rotated (see screenshot). In this case it's impossible to crop the video as desired.

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[Attachment 62912 - Click to enlarge]