I am a new forum member and have noticed that at the of a post or reply, and below a horizontal line, the posters place his/her grade icon, along with ribbons and badges earned. How can I get to do it?
I believe there might be a minimum post count to do that.
Disregarding that point, here's how:
Right click the Profile tab (so you can read the instructions while you are doing this)
On the left, under Modify Profile, click Forum Profile
In the Signature area, insert the URL for an image, which you have hosted somewhere else on the 'Net, between image tags (like this, without the spaces - [ i m a g e ] your URL [ / i m a g e ]
Images in your signature must be no greater than 500x150 pixels.
Click the Change Profile button, and it will appear in your posts.