I open another browser window, and go to the thread I want to link to. Then highlight and copy the address from the address bar. (http://divorcebusting.com/blah blah blah....)
When you create your thread, or edit or reply to a post other than in the quick reply box, you've got a bunch of icons across the top ot the text box. On the far left is one that looks like the world, with a chain link. Click on that. A window will pop up, paste the address you copied there, and hit ok. Another window pops up, enter the text you want to appear for the link there, and hit ok. And you are done!
If you want to you can do it manually like this: [ url=http:the_address//]The words[ /url]
