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:
[![CrunchyCrowe's Avatar](https://chowlings.com/images/avatars/428.png?v=1644063292)](https://chowlings.com/user/CrunchyCrowe) [CrunchyCrowe](https://chowlings.com/user/CrunchyCrowe)