is there a way to insert a signature on every post - even in other people's posts?
 

i have a question VB Experts!
is there a way to pre write something like a link. and make it show up on every single post?
for example when people try to make a new post, there will be a link or other contents on the bottom. for example, it's just like the previous email showing up on the bottom when you reply to someone's email.

Do you mean something like default signature? Have a look at the Add-ons section.

yes! but do you know which add on? I had a hard time finding it. Please help

I was merely pointing you to the addon section where all the mods are released. If you didn't find any then maybe such a addon hasn''t been released yet. Try to request it and hopefully someone can create it for you. It shouldn''t be too hard to code it.