Ticket Signatures like Canned Replies are set up on a per user bases. This means that each Agent can set up their own personal signature. They may provide more than one signature.
1. head over to Ticket Signatures.
2. Click on "Add Signature"
3. Give your signature a title so you can easily recognize it.
4. In the field below the title add the body of the signature.
5. When done click "Save"
6. You're done!