ViewSonic VPAD10 Guia Del Usuario página 33

2. Display Options
Display: Select the output display device
Calibration: Do not use windows system build-in screen calibration, if you wanted to Calibrate a Touch screen, please refer to the
additional page: "Calibration of the touch screen".
Reset: If you did wrong that with build-in screen calibration, you can click the Reset button to restore the default.
Go to Orientation
This device's built-in G-sensor ,you don't need to do this settings.
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ViewSonic VPAD10