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