okay.
so you know when you click "reply" the box you type in pops up? there is a blue outline around the box i am typing in right now. so, in the blue outline, at the top is where you decide if your text is centered, where you see the bold, italics, and underline symbols, etc. anyway, the source thing doesn't matter, just trying to show u where it was. above where u type, there is a very small (maybe half centimeter by half centimeter) box. look for the paperclip symbol, its right next to that 2 spaces to the left. You can see the faint outline of a house (looks like a landscape) click on that. I explained everything else in last thing. Hope this helps (hard 2 explain)