The Flex Periods screen is where the core settings of the system are defined.
This page primarily has to do with setting up the Flex period(s) that will be run and the related details. It is possible to set up multiple Flex periods in your system, but it works best when the flex periods do not overlap in time on the same day.
Here is a video that reviews the Flex Period Settings screen and options.
This section section of the guide covers: