This is actually an “old” tip. I write it here because I have been seeing some people are still using Options / Send menu to send message (SMS, MMS, Email). You can actually just press Call key to send message (no need to select Options /Send menu).
Compatible devices : S60 1st, 2nd, 3rd Edition, Nokia N-Series Nokia E-Series.
Compatible devices : S60 1st, 2nd, 3rd Edition, Nokia N-Series Nokia E-Series.