Click on the little bar graph icon in the Schedule Editor to open the Schedule Analysis window.  This is where you can quickly study the day that is currently loaded into the Schedule Editor. Just click on the Setup button and pull down the Target field to select the item you want to study.  In addition to seeing the number of scheduled or unscheduled songs each hour, you can also count the number of songs with a particular attribute code, see the average value of any numeric field, and much more.  The second tab on this window is where you set up your Instant Analysis window.