In the rich text editor:
@SpookZoneSpooker
In a comment:
[SpookZoneSpooker](https://chowlings.com/user/SpookZoneSpooker)
For Names and Avatars:
In the rich text editor:
%SpookZoneSpooker
In a comment:
[![SpookZoneSpooker's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/SpookZoneSpooker) [SpookZoneSpooker](https://chowlings.com/user/SpookZoneSpooker)