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