Unassigned and Unavailable Periods

A period for which a Shift is configured is referred to as an Available Period.  Activities can be inserted and moved to an Available Period.  An Available Period that does not have Activities assigned is displayed as a Unassigned Period.  Unassigned Periods are shown in black.  A new Activity can be inserted within an Unassigned Period.  

A period for which a Shift is not configured, or the Shift is turned off, is displayed as an Unavailable Period. Unavailable Periods are shown in grey.  An Activity cannot be inserted or changed within an Unavailable Period.