In the rich text editor:
@Veronapmi
In a comment:
[Veronapmi](https://chowlings.com/user/Veronapmi)
For Names and Avatars:
In the rich text editor:
%Veronapmi
In a comment:
[![Veronapmi's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Veronapmi) [Veronapmi](https://chowlings.com/user/Veronapmi)