Well first off, premade shapes and symbols to add to a picture in gimp or photoshop are all over the internet. Just google what you need and add "transparent" as color option in the google search engine (found under search tools if memory serves).<br/>Open gimp or photoshop, click and paste the image there onto the one you wanna edit, and save. If you aren't familiar with gimp or photoshop this won't help, though. I have no tricks for editing pictures without them.<br/><br/>As for symbols...<br/><br/>I present my source: http://jaffagazanian.tumblr.com/post/5528389956/cool-characters-symbols<br/><br/>Copy paste, resize and color away ;)