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