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