HP LD4245tm 41.92-inch Interactive LED Digital Signage Display - Manual (Page 73)

Connect the USB cable to your computer so that it automatically recognizes the touch screen display.
Go to Control Panel, select System and Security, and then select System. The number of touch-
points supported is displayed under Pen and Touch.
CAUTION: You can use the touch screen after the computer recognizes the display.
NOTE: The display can respond to five touch points when connected to a Windows 7 computer.
NOTE: When using the touch screen display, HP recommends that you set the screen aspect ratio
to 16:9 or Just Scan.
For more information about gestures and settings on Windows 7, refer to Windows Help.
Using the touch screen 63