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