Can text be sent to multiple screens?

Is there a MUSHclient command that sends what you type on one screen to multiple screens?

I find it quite annoying having to type 'wake', 'follow *', and whatnot on all of my multies' screens.

Yes there is. Under the Game menu, choose "Send to all worlds" (Ctrl+Alt+S).

You then see a list of your active worlds. You can select or deselect items from the list (in case you don't actually want to send to every world).

Then type in what you want to do and click OK, or hit <Enter>.

Next time, it will remember which worlds you selected, so you can bypass the initial step of choosing worlds.