Referring to Filemaker Asia Pacific News, July 2012, page 4: the article Highlight for Visibility.
"One powerful feature of the VMR Bribie Island database is that it automatically alerts the operator when a vessel is overdue. It does this by popping up a reminder onscreen."
I understand how conditional formatting is used to change the field colour, but how is an automatic alert created? The only way I can think of is to have a continuously looping script, which would then preclude the user from casual data entry.