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