How to refer to someone else's message?

[AlReef]

Hi all, I'm new here :)
I've noticed that some people refer to others messages by having it in bold at the top of their message. How does that work please?
Thanks

[Justmuddlingalong]

Copy and paste the part you want to highlight. Put an asterisk directly before and after. Like this but without the spaces before and after.

[AlReef]

Thank you!!