Sending multiple PM's

Sorry to be an idiot, but when trying to send PM’s to all, attending my bakeoff, it will not let me send the same message, to a different user.
How do I include all the users in one PM?

Just add all the usernames into the address box. I think there’s a limit of about 25.

Do I type the users names in, or can I click on their user name, and copy and paste somehow??

Got it, thanks.

Good - sorry, I’d left the computer so didn’t see your second question.