In the rich text editor:
@Dawnnight22
In a comment:
[Dawnnight22](https://chowlings.com/user/Dawnnight22)
For Names and Avatars:
In the rich text editor:
%Dawnnight22
In a comment:
[](https://chowlings.com/user/Dawnnight22) [Dawnnight22](https://chowlings.com/user/Dawnnight22)