In the rich text editor:
@mori
In a comment:
[mori](https://chowlings.com/user/mori)
For Names and Avatars:
In the rich text editor:
%mori
In a comment:
[![mori's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/mori) [mori](https://chowlings.com/user/mori)