How do you ping a user? x.x

I feel kinda stupid for not knowing this, and I've been here over a month.

But seriously, I've searched through many topics and haven't found a thing.

I feel ignorant. xD

@ then the username, no spaces, nothing so if I want to ping you, I do @ then Siryn together, so it is

the @ followed by their username not all names can be pinged though

Thank you so much. (: