two ways - one attach them to a post using the 'upload a file' button which is the middle of three on the bottom right... we ask people to keep that reasonable since the files are stored on our server secondly upload them somewhere else- photobucket or whatever and use the image link on the top bar (thats the one that looks like a little painting immediately to the right of the smiley face) and paste the image url into the box that pops up