In the rich text editor:
@SQU1SHU
In a comment:
[SQU1SHU](https://chowlings.com/user/SQU1SHU)
For Names and Avatars:
In the rich text editor:
%SQU1SHU
In a comment:
[](https://chowlings.com/user/SQU1SHU) [SQU1SHU](https://chowlings.com/user/SQU1SHU)