In the rich text editor:
@starscout
In a comment:
[starscout](https://www.chowlings.com/user/starscout)
For Names and Avatars:
In the rich text editor:
%starscout
In a comment:
[](https://www.chowlings.com/user/starscout) [starscout](https://www.chowlings.com/user/starscout)