In the rich text editor:
@DownTooClown
In a comment:
[DownTooClown](https://www.whistlercrest.com/user/DownTooClown)
For Names and Avatars:
In the rich text editor:
%DownTooClown
In a comment:
[![DownTooClown's Avatar](https://www.whistlercrest.com/images/avatars/default.jpg?v=1707552398)](https://www.whistlercrest.com/user/DownTooClown) [DownTooClown](https://www.whistlercrest.com/user/DownTooClown)