Along the top of the box you enter text in is a line of icons. (Bold, italic, underline, font, size,color, smilies, ... Keep going across; 3 rd one in the next group is a tree... Click on it, then you can find,choose, upload your picture- follow the prompts. Or- under your dialog box are (3) options; post quick reply, go advanced and cancel. Choose "Go advanced" then, 'manage attachments' browse, choose, upload, close window, and post