But I (or maybe more users) would like Paste automatically in File the cropped area of screen and not only the full screen.
@Wolfboy,
You can always file a suggestion in the FBH, but the filename they use saving the file is not much help when you go back and try to find it.
I personally prefer to "save as" and use a file name that means something to me rather than a meaningless name like this one created automatically 😎: