So I know I've been on Mido for awhile, but I still can't seem to find where I put things into my signature. Is it something I tack onto posts in the forums? ^^;
You see the box near your avatar at the top in the banner area? click on the word account! then, in account options, choose 'edit profile', and from there go to profile info. You can put things such as your signature, location, etc. there. It's hard to figure out at first, but you get used to it eventually <3 Just be careful of character limits and such.
It took me forever too. Also, I just realized...You can skip the first step and click the 'edit profile' thing listed there too. Oops. ^^; But hope it works out for you now <3