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