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