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