In the rich text editor:
@M34T_G0R3
In a comment:
[M34T_G0R3](https://chowlings.com/user/M34T_G0R3)
For Names and Avatars:
In the rich text editor:
%M34T_G0R3
In a comment:
[](https://chowlings.com/user/M34T_G0R3) [M34T_G0R3](https://chowlings.com/user/M34T_G0R3)