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