I recently heard about an interesting shortcut, in Photoshop, involving holding Alt (I think) while clicking on a color and automatically creating a layer of that color in the image document.
That is, doing this will take every pixel in the graphic that matches the color and add it to a new layer in the layer group; and it is done with a modifier and a single click.
This sounds very useful, as this general procedure is something I will frequently do while doing a hand drawing. However, I'm primarily a GIMP user and plugin writer, and this isn't significant enough to change over.
Does GIMP have a shortcut like that built into it already? Or will I have to write a Python macro or something similar to do it?