When working with packing slips (in the menu bar choose Goto > Packing Slip) you can move a selected quantity of items from the Available Items table to the Package Contents table.
1) In the Available Items table, select the rows of the items that you want to include in the package for shipment.
2) Choose the arrow button. The Package Contents table shows the contents of the packages for delivery.
3) Add additional packages as required. Choose the Update button, and then choose the OK button.