VIEWSONIC 24" Frameless Touchscreen Monitor - Manual (Page 23)

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When using the touch function, please note:
• The touch function may need about five (5) seconds to resume if the USB
cable is removed and plugged in again, or the computer resumes from
Sleep Mode .
• The touchscreen can only detect up to ten (10) fingers simultaneously.
• If the Windows’ cursor does not accurately follow your finger when you
touch the screen, do the following:
1. Open: Control Panel > Hardware and Sound > Tablet PC Settings
2. Select Calibration .
3. Follow the instructions to recalibrate your screen.
If Windows cannot identify the touch screen when you touch the screen, do the
following:
1. Open: Control Panel > Hardware and Sound > Tablet PC Settings
2. Select Setup > Touch Input .
3. Follow the instructions to identify the touch screen.