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