I don't have the second tab, probably because I am too new. As for what's on the tab, I wasn't looking to upload an attachment, though I may have been able to achieve my goal that way. I'm not sure of the coding of this forum.
The goal was with the command [url=link]text[/url] you have a word or words like Click Me that is actually a web link. Some but not all forums are coded to use this command line. You can substitute a full size image link after =, and a thumbnail image link instead of click me. It would look like this [url=fullimageURL][img]thumURL[/img][/url] to display a thumb on the forum page that one can click to open the full size image.
It's possible that the code works upon submission, but not in preview. or maybe I was typing it in wrong. well lets try.
Edit:Well what do ya know... I had to have typed it wrong. It worked in both preview, and in submission. I'll fix my first post. Ty Squeeky for getting me to look at my coding again.