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