Click the "Settings" left of the 'Logout' option and under 'My Settings' section, click "Edit Signature". But if you still do not fall within the Signature guidelines listed under the same section, you cannot add the signature yet.
Signatures and live links within posts are not available to users until they have been a member at least 7 days, have positive (green) reputation and have at least 10 posts. http://forums.digitalpoint.com/faq.php?faq=signatures#faq_signature_requirements
And never try to add fake signature in each post till your permission else you will get infraction for that. DON.
I just added my signature and it did appeared for the latest post but not for my previous posts? Is there no way it can be enabled for those? Also how do I go about contacting the digitalpoint support? I don't see any helpdesk section so thought of asking in this thread...
Nope. Its not applicable to your previous posts but now onwards its visible in your all future posts. You can contact mod or admin using below given link. http://forums.digitalpoint.com/showgroups.php DON.
Your first post was on Jun 16th 2010, 9:46 am so you have not met the 7 day requirement. Eligibility is set by a CRON job and is not instamatic so do not expect to have signature at 9:46 tomorrow.
You should daily reply two or three threads according to the relevant topic and daily try to add your Signature. One day you will success in adding your signature.