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