In the rich text editor:
@Kiwistars
In a comment:
[Kiwistars](https://chowlings.com/user/Kiwistars)
For Names and Avatars:
In the rich text editor:
%Kiwistars
In a comment:
[![Kiwistars's Avatar](https://chowlings.com/images/avatars/457.jpg?v=1658019357)](https://chowlings.com/user/Kiwistars) [Kiwistars](https://chowlings.com/user/Kiwistars)