Please consider adding to the image() reference page

Issue description

image(img, dx, dy, dw, dh, sx, sy, sw, sh);

Drawing part of an image (from a sprite sheet, for example) is really important. It comes up in a forum response, but not in the documentation.

It can be found if (a) one assumes that it is doable despite missing documentation and (b) one Googles "how to draw part of an image in processing". I believe it ought to be part of the main documentation as I don't think this is an obvious assumption to make.

URL(s) of affected page(s)

Forum page:

https://forum.processing.org/one/topic/displaying-a-part-of-the-image.html

Reference page

https://processing.org/reference/image_.html

Proposed fix

Please consider putting the example from the forum on the reference page for image().