To add a signature to a post you must first create one; this is done via your profile.
To create a signature;
.Click on the profile button on the bar.
.Click on the word 'signature' that is above the grey marble divider
.In the box under 'edit signature' type in your text. to enter links click on that little button with the chainlinks on it and paste the URL in the top line and the words in the bottom line and click 'ok'
.when you are done, make sure to click on 'Save'
Once created you can check the 'Add Signature' box on the posting form to add your signature. You can also add a signature by default to all your posts by checking the appropriate box under the 'preferences' section of your profile. You can still prevent a signature being added to individual posts by un-checking the add signature box on the posting form.
•Signature size is to be no bigger than 800x150 pixels (width x height). INCLUDING text!