In the rich text editor:
@RavygMoon
In a comment:
[RavygMoon](https://www.worldofgaia.org/user/RavygMoon)
For Names and Avatars:
In the rich text editor:
%RavygMoon
In a comment:
[](https://www.worldofgaia.org/user/RavygMoon) [RavygMoon](https://www.worldofgaia.org/user/RavygMoon)