UP-3300 (serv.man5). Keyboard and display - Sharp EPOS Handy Guide. Page 4

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Function-4 and Function-5 screens are defaulted to contain Free
text keys.

However as with any of the key screens they can contain any key
you require.

There are some advantages to having P.L.U`s on these screens
as opposed to the Menu screens as you could have up to have 60
pre-set P.L.U`s and level shift keys on the one screen.
Pressing the level key would then display another 60 P.L.U's.

Also you need to be informed that Function screens 1 to 3 default
as one shot screen. Therefore after depression of a key top on
these screens the screen will return to the home or sub screen, to
change to stay down you would have to change line 980-D in the
Service settings.

Function screens 4 and 5 are not one shot, they are stay-down
type screens.
There may be advantages to both one shot and stay down.

Using the default key text, Function one screen will be accessed
by pressing the Key top labelled Function-1.
Pressing the Function-2 key top will access function two screens.
Pressing the Manager Function key will access Function-3 screen.
Pressing key top labelled Text-1 will access function-4 screen.
And pressing the Text-2 key top will access Function-5 screen.
Although any name can be given for these keys, for example you
can rename Text-1 to be Wine List.

The next screen that you may need to set up is the Payment
screen.
You may have guessed from its name that this is where you would
normally allocate payment type keys this key screen is called up
when the PAYMENT key is pressed.

The next screen is called the Drive through screen.
This screen would be used for the drive through functions of the
UP3300.
On this screen only a maximum of 30 keys can be assigned, as
the remaining area of the display is required for drive through
orders.