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