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