Descrtiption: A choice given to admin: showing "Last edited by admin, at.." or not.
This choice can be put at the page newthread, newreply and edit post.

Reason for request: sometimes I want that note is displayed to show people that there are new info on my post, sometimes I don't want because I just putting a line-break, for instance.

Thanks in advanced.
(My version is 3.6, I can't edit the mistake in title of this post!)

It's already built into 3.6 Usergroup Options.

No, it is different. In Usergroup manager, for example in Admin group, if u click "Display 'last edited by...' ", then ALL of your edited post will have that line, not optional!

Isnt that what the Reason for Editing: when editing a post does ?

So you think it would be easier just to code it then? It's not a simple business!