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