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