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