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