Dot marking own posts

I know this has been asked and answered before but I cannot find it anywhere here with the search function or even with google so take my apologies, anyway:

On this board you have these tiny dots next to threads that contain posts of yourself.
However, I cannot find them in any of the boards I'm running (all 1.2.10) and I'd like to turn this feature on if this option exists somewhere or install the mod if there is any.

Can somebody help me here?