For portrait artists, it would useful to allow rotation for cropping with additional option to make sure the lines are clean when rotating. I have checked to see if you can crop with an angle when the screen is rotated, but as it turns out, you can't.
It's a little late and I should nap, but what I'm trying to say that it would be useful for portrait artists to have the option to rotate the cropping.
Created attachment 129139 [details] Mockup of two possible options Should it crop (using the rotated rectangle) and then rotate (so it becomes a rectangle again after the crop - see row 1 in the mockup file I attached), or should it just crop but not rotate (so it's left kinda skewed - see the second row in the mockup file)?
Created attachment 129140 [details] rotate_canvas Personally for me it would be ideal, if it rotated canvas for "locked" crop rectangle box, so you could most clearly see the result. If it's problemtatic - rotate box, crop, rotate cropped region back to same angle cropping box was rotated. If it has guides like current crop tool has, it's better, but additional central guides would be welcome.