need like this:
delay -> screenshot fullscreen -> select a region in the finished
screenshot of the entire screen -> done
You can use: sleep 5; xfce4-screenshooter -f
Once the screenshot is taken select "Open with: GIMP" (or whatever image editing app you fancy) then crop the selection you need.
I'm not saying screenshooter will never have an option to edit screenshots, but I'm not motivated to implement this because we may start with a cropping option, then people will want to draw red rectangles, then arrows, then text, then emojis.... In the end, screenshooter will have its own built-in gimp and that goes against the "do one thing and do it well" philosophy that is more or less followed by Xfce.
Andre has agreed on IRC that this can be implemented ( delay -> select region -> capture ) and in order to preserve the current behaviour we'd have a checkbox and CLI option to toggle between the two behaviours. Either this one or my bug (bug 16494) should be closed as a duplicate.
Are you suggesting the removal of select region completely, as this is a basic feature of a screenshooting tool. This enhancement is about improving the user experience for what most users would consider the correct behaviour of the delay not being after the region selection, as most other screenshooters have it.
I've said it multiple times: I'm not going to embedded an image editor in screenshooter, that's much more complex than screenshooting. Rectangle region selection is useful when you don't need precision cropping, when one needs pixel-precision then go for an image editor.
I know gimp sucks even for basic stuff, for example, add arrows, rectangles, ellipses, etc. Ideally we'd have a basic image editor for Xfce (e.g. xfce4-paint) that could be used as a screenshooter companion, until that becomes true I can only recommend 3rd party editors.