How do I add pictures to the bottom of my posts?

I want to add some pictures to the bottom of all my posts. I have noticed people putting in their current projects etc etc. I have looked in the FAQ but cant find any info on how to do this. Please help.

Tried FAQs?
See the Profile word? Top right hand side of this page.
Profile Calendar Members....etc
Click on Profile then click Edit Profile.
Look for Signature and add it your image urls and stuff there.