Signature links question

[Scarecrow]

I've seen in some posters signature a small image that is clickable to link to somewhere else.  A prime example is a KerbalX image that links to the relevant KerbalX page.  As I have a few craft available for download now, adding a clickable image link is something I would like to add to my own signature but for the life of me I can't work out how to do it.

I can add an image that isn't clickable, or I can add the URL as text which is clickable, but can't work out how to combine the two.  Thinking it might need some clever BBcode, I did a search, but the BBcode tutorial that search found would appear to be in serious need of updating.

Anyone else able to shed light on how to achieve what I am trying to do?

[HebaruSan]

Ctrl-right click the image and select "Edit Link".

[Scarecrow]

Sounds easy enough.  Thank you.