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