How to disable the customer screen directly on the E800 cash register.
Press the Onslip app to go to the desktop.
On the desktop, press the gear icon to open Settings.
Select Screen under Devices.
This is the first option in the list and the third choice from the top.Select Slave screen settings or Vice Screen Setting.
Change the setting from No to Static Images.
You have now turned off the customer display.If you want to reactivate the customer display later, follow the steps above and change the setting in point 5 from Static Images to No.