Little circle thing in the middle of brush entities

Beetle

L9: Fashionable Member
Aug 17, 2008
627
178
I've always wondered what the little circle you can pull outside of some brush-based entities was. Its hard to name, so it is hard to look up in, say, the valve developer wiki.
 

Beetle

L9: Fashionable Member
Aug 17, 2008
627
178
Oh ok. I didn't think of that because I was just using a separate brush coated in "ORIGIN" texture to make the origin. :p