Enable Pack All feature controls whether packing (the second verification after picking) can be skipped by using the Pack All checkbox in the mobile app.

When packing an order multiple times, keep updating the existing invoice. If this is enabled, new invoices will not be created when you partially pick and pack a sales order more than once. 

Block manual edit of quantity during Pick Order/Invoice (items could be picked by scanner only, for iOS and Android). If this is enabled, handheld users will only be able to pick sales transactions by scanning item barcodes. Manual entry of Picked Quantity is disabled.

Pick/Pack Sales Orders: Include not shipped items into Packing slip report.  By default, packing slips resulting from packed sales orders only include items that were picked and packed. If this function is enabled, all the item lines on the sales orders will be included on the resulting packing slip, including items that were not picked and packed.

Example of a Packing Slip that includes items that were not picked and packed