I've seen where posters "draw" on photos or diagrams (for example you circle an item and say "this spot here"), but I can't figure out how to do it although I'm sure it must be something relatively simple.
At work I use your basic Windows XP type computer. Nothing fancy on it like Photoshop, but most of the typical programs that come on it.
At home I have an "ancient" G3 iBook laptop, again with the usual programs that come on it. (OS 10.3.9).
Can anyone explain how I do this? I'd especially like to be able to do it on my home computer.
Here's a .jpg excerpt from a recent post by Sal's Dad that shows one example of what I mean. In this example it looks like his additions are typed in, but usually they look hand-written:

Thanks,
Rachel