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This option allows you to receive all lenses for the entire purchase order. You can control this option by checking the "Allow "Receive All" while receiving lenses" check box on the Inventory tab in System Settings.
Receive by OPC:
To count by scanning OPC codes, go to the "Enter OPC # or Qty" prompt at the bottom of the screen. Simply start scanning OPC codes. As you scan each OPC code, it will appear in a list to the right for your reference. If you wish to enter a quantity, first scan the OPC, then enter the quantity. If a mistake is made, you can even enter a negative quantity.