I'd like to draw an arrow in GIMP (which was answered by How do I insert arrows into a picture in GIMP?), but the problem is I'd like a black outline (or stroke) for a red arrow. I somehow managed this with an earlier picture in GIMP of mine:
note how there's a black outline around it. The problem is, I've forgotten how, so how do I? I know I create arrows using the arrow script. Just it doesn't create a black outline...