Editing a post - how to 'thank'

[L Bell]

I'm on some other blogs using this (phpBB) software, but can't find the option to edit your own post on this one.

Is it disabled?

Also, how does one 'thank' a user?

[dai h.]

(if there is one) click the "thumbs up" icon

[Nocentelli]

Edit disappears after a minute or two.