When you are in the classroom sometimes you take a picture of a projected slide from the side, so the picture is in “diagonal” or angled. There are apps that allow to adjust for the tilted angle to return the picture so it looks like it’s facing forward. It’s better, and more readable. It also takes less room from you note since you don’t have excess corners

The request idea is to be able to adjust the corners so the picture adjusts the angle and it looks facing forward