I need to put a signature in my posts.

How do i do that ?

Go to your profile and where it says Signature press the button next to it

Also, make sure it follows these rules

Signature Rules and Guidelines (violations may result in loss of rights to have a signature):

The entire size of your signature shall not exceed 400 pixels wide by 150 pixels high.
Text sections of your signature shall not exceed 6 lines of text if you include no images, and 3 lines of text if you have an image.
Total size of the images contained in your signature shall not exceed 70 kilobytes.

ty guys