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