In the rich text editor:
@shadowattak1
In a comment:
[shadowattak1](https://www.worldofgaia.org/user/shadowattak1)
For Names and Avatars:
In the rich text editor:
%shadowattak1
In a comment:
[](https://www.worldofgaia.org/user/shadowattak1) [shadowattak1](https://www.worldofgaia.org/user/shadowattak1)