Enter the start and end times for the flex zone IN and OUT. +IN refers to the time before schedule start, -IN to after schedule start and so on. This check box must be checked to be able to enter the time.
Note that the flex zones for + flex can not stretch past midnight. A day schedule that ends at 23:00 (11.00 p.m.) can not have a flex zone that ends at 01:00 a.m.