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