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