Thanks for the feedback. The crop workflow only allows you to repositon the outer crop marks around the image. You may need to change the zoom level (zoom out) if you're unable to see them all. Once you've finished with the cropping, clicking outside of the cropped image area completes the crop workflow. You can re-enter the crop workflow by double-clicking on the cropped image. If you re-enter the crop workflow, you can adjust the outer crop marks again or reposition the image within the crop by click and dragging on the image within the crop area.
Hope that helps,
@default32333759kry6do Good question, I looked to see if we had it documented anywhere first but I didn't find it. I learned by testing and trial and error myself. I agree it would be helpful to have it documented.