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