User blog comment:Florence100 the Sylveon/Add a picture to my signature?/@comment-3495717-20130730215753

First you need a page to get the signature from (User:Satanchu/sig will do fine). This page should include whatever you want in your sig (minus the timestamp of course). Here's mine for reference.

Once done, go to your Preferences, go to the Signature section and put in the white box. Tick the "I want to use wikitext in my signature" box and save your settings.

Done :)