First click in "Settings", see pic attached........
Then scroll down to "My Settings" and click "Edit Signature", see pic below..........
Then type in the text you want to appear in your signature and click "Save Signature" at the bottom. See pic attached.......
Hope this helps..........
But please note, there are rules for what is allowed in signatures. These rules can be found here............
https://www.escort-ireland.com/board...ure-rules.html