You use the POS Key Number Setup table to assign numbers to menu keys, fixed keys and to define keyboard wedges.
Menu keys: are dynamic keys, which appear on-screen and change during run time.
They are either operated by soft menu keys on the side of the POS Terminal screen,
or in the case of a touch screen, by touch. Commands are assigned to the menu keys in the POS Menu Line table.
Fixed keys: are the keys on the POS keyboard. These have certain names (or values) that are predefined
and can be found in the hardware documentation. You can assign numbers to each one,
making them identifiable to the application. Commands can then be assigned to the fixed keys in a
fixed keys profile in the POS Menu Line table.
A keyboard wedge: needs to be defined when a peripheral (MSR or Scanner) is connected through the
keyboard port. Windows then interprets the communication from the peripheral as a string of keyboard
input. The MSR or Scanner, however,begins each transmission with a signature value and ends it with
a specific value, usually Enter. If you define a keyboard wedge with the signature value of the peripheral,
the application is able to recognize the signature value and interpret the transmission from the peripheral,
not as keyboard input, but as transmission from the peripheral defined in the POS Command field.