I click on the “crop” tool at the top of my screen, which brings up the horizontal and vertical lines over the image to help me while I adjust the crop. I have an image open in P元 which I am editing. I added a check mark for “vignetting”, but I’m not sure what difference the check mark makes…? I’m not sure what I’m supposed to do with that list - haven’t learned that yet. As you suggested, I clicked on GEOMETRY and a long list of things showed up, some with check marks, others without. Yes, I am using the right triangle to bring up “Unconstrained”, but I would have preferred that to be my default choice unless I wanted to change it. As I recall, everything became active as soon as I installed Viewpoint.) Personally, I like vertical lines being vertical, even if the camera is pointed slightly up or down, so I need room to allow me to straighten them (That’s one more thing I love about this software, as it is so easy to correct - much more so, than the tools I have in Lightroom. It’s just one more tool that allows me to create the effect that I’m after, and yes, I have learned to shoot wider than I otherwise might, so I have room to crop if the photo isn’t level.
Thanks, but I’m not sure I am being so “smart” about it… to me, crop is just one more factor like shutter speed and aperture, that changes from picture to picture.