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