Before you sign off completely there is a box for SEND A REMINDER if you send a reminder and do not put in a date it simply sends it as a yellow highlighted e-mail right then.
Not as good a sign off as before version 5. The version 4 sign off windows allowed a "real message" to be sent, not just a reminder. Real messages can be color coded (which alerts my over-burdened staff on urgency, need to file in chart, etc.), and can be sent to more than one recipient, or a group. Reminders can't.