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