Period Screen 
Period Screen
This function takes you to the period planning screen. What is displayed depends on where you are when you choose this function:
The system internally determines the structure of the overview screen and then displays the period screen that corresponds to the first row of the overview screen.
The system displays the period screen for the selected row or the row where the cursor is positioned. The characteristic values in that row appear in the header of the period screen.
The rows of the period screen contain the individual periods for the current combination of characteristic values.