The fields in the picking frame in Warehouse Maintenance default to the picking frame fields in Storage Location Group Maintenance. So, you can define the Zone picking parameters in Warehouse Location Maintenance that the system uses for picking inventory.

Going back to the Warehouse Maintenance menu, set up the start and end picking levels to define the range of zones the systems use to satisfy pick tasks.

These picking levels associate back to the picking level parameters setup in storage location group maintenance (Step 1).

In this example, picking starts in 040PL move to 040BX and end in 040EA if needed.