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