Cropping but selecting stuff to discard, not keep.

[seanspotatobuisness]

I want to perform a crop operation but instead of defining the area to keep, I'd like to define an area to discard. I have a picture of a table and I want to keep the highlighted areas and discard the areas which are not highlighted and it would be quicker if I could select an area that is immediately cut out, reduces the height of the image and shunts together the two remaining pieces, ready for the next crop.

[ythgilb]

.
This forum has been dead for a long time.
.
The folk who were here moved to
https://www.gimp-forum.net
Please ask there to get questions answered