The current behaviour of dragging rectangle for cropping is a little annoying, as you can not stop, correct, adjust once you have begun.
The standard of having the whole area of drawing/picture
Then selecting corners or sides to expand/reduce area works perfectly, as users can adjust and make corrections
In the following image you can see how to different apps use transform (crop) tool:
The current behaviour of dragging rectangle for cropping is a little annoying, as you can not stop, correct, adjust once you have begun.
The standard of having the whole area of drawing/picture
Then selecting corners or sides to expand/reduce area works perfectly, as users can adjust and make corrections
In the following image you can see how to different apps use transform (crop) tool:
