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