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