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