Is there a way to pull on a point in the canvas and transform the whole shape of the canvas?
Say I have a rectangular canvas ... and I go a little way in from the bottom right corner... and then I click and hold and drag the mouse in downwards-right direction ...
The idea should be that you then get a canvas which has a bottom right corner which is dragged down and right ... and that the whole of the area of the canvas (and thus image) is distorted around the area where you did the click and drag ...
If canvases can only ever be rectangular ... then what about a box with some image in it, with lots of empty space between its edges and the edges of the canvas ... is there a way to perform this sort of pull-and-stretch that way?
Exactly how Gimp applies and distributes the stretching effect might be subject to one or two parameters ... first question though: can it be done, and if so please give me some cursory idea of what I have to do, thanks.