Im trying to get one of those pictures on the bottom of my messages when i send them but i cant understand how....can u please help me

I am not an expert at this by any means. I am sure one of the others may be able to help you out better than this.

Until a computer guru answers though... you need to go to the upper right hand corner of the screen and click on "My Profile" you then need to provide the link or I think download the picture that you would like in the signature spot..

Hope this helps.