From Opus

A signature is a piece of text that you would like to be inserted at the end of all your posts, a little like having headed note paper.

To try and limit the amount of spam on the site, users can only set up a signature once they have made a 10 forum posts (gallery comments do not count) and been a member of the site for 5 days.

If we feel a link in your signature leads to a website liable to cause bad feeling amongst our membership and disrupt the friendly atmosphere on our website, we will remove it. eg. a website where trophy hunting is a feature. Additionally, please keep your signature in left justified format, not centrally placed. We will remove or edit signatures that we deem too large or gaudy, so please be subtle with signatures.

You will have the option to include your signature on any posts you make. If you have specified a signature, then the forum will automatically append your signature to any messages you post. You can disable signatures on a per-post basis by un-ticking the 'Show Signature' checkbox when you compose your message.

You may turn the signature on and off on posts you have already made by editing the post and altering the state of the 'Show Signature' option.

You can set your signature in your Edit my Signature.