To transfer stock you must have the correct location set up in the operator details in Point of Sale, ensure the location of the parts you want to sell from is in the Sell from field in POS Operator Details and the Stock location to use is correct.
•From the Master Menu select Point of Sale
•Select Miscellaneous options from the Point of Sale menu
•Select POS Operators from the Miscellaneous options menu
•Type in the Operator number or select from the drop down box
•When you click into any of these boxes you can see the options at the bottom of the screen (as below)