How to edit your signature?

[Heathcliff]

This is embarrassing but I can't work out how to change my signature. Could someone advise?

[Spoo]

If you head over to your Account Settings (you can find it under the down arrow next to your username at the top right of the screen), you should be able to see a Signature tab in the section on the left. Although, that's doing it on a laptop and not mobile.