Quote Originally Posted by Evantide View Post
Make sure to leave the picture blank, and when you assign it to the hotbar it will show the picture for that ability.
Well, it doesn't have to be left blank, just select whichever of that limited selection will help you find it within the Macro window in case you want to go back and edit it later. But if you use the /micon command, it overrides that picture on the hotbar, so the Macro window itself is the only place the initial picture will show up.