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