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