The Transaction Functions in the POS window can be activated by using the corresponding function keys, such as [F4] to open the till. There is a description of what these functions do in the Overview of the Transaction Function Keys article.
Keyboard Shortcuts from the POS Window
Insert - Brings the keyboard cursor back into the "Enter SKU' box.
End - Opens the payment window.
Tab - Scrolls through all of the buttons in the POS window.
Up + Down Arrow Keys - Lets you highlight items in the transaction.
Delete - Removes a highlighted item from the transaction.
Keyboard Shortcuts in the Payment Window
Insert - Inserts the green payment amount into the selected payment type.
End - Completes the transaction.
Tab - Scrolls through all fields in the payment window.
Arrow Keys - Scrolls though only the payment boxes.
Return - Press return to process a previously typed amount. ex. Will calculate remaining balance on transactions with multiple payment types.
The functions of the Miscellaneous quick launch tab can also be activated with the keyboard.
Shift-F12 - Opens the Gift Card and Gift Certificates menu. You can create and view existing gift cards here.
Shift-F11 - Clears all SKUs out of the POS window.
Shift-F10 - Lets you change a description previously added from the POS window.
Shift-F9 - Opens the menu to process Paid Ins/Outs.
Shift-F8 - Inserts a blank line into the transaction.
Shift-F7 - Lets you change the ship to address.
Shift-F6 - Open the Rental /Reservations menu.
Shift-F5 - Opens the menu for gift registries.
Shift-F4 - Opens the sales return menu.
Shift-F3 - Lets you change transaction item attributes
Shift-F2 - Opens the web store manager.