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