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