Dell Latitude XT - Manual (Page 8)

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Dell Latitude XT Multi-Touch Gestures Upgrade
18 Select Yes, I want to restart my computer now, and then click Finish.
19 After your Tablet-PC restarts, the N-trig icon in the system tray contains a
red "X", with the balloon message ...The digitizer needs to
be calibrated...
20 Tap the balloon to start the calibrator.
NOTICE:
While the calibrator is running, do not touch the Tablet-PC screen.
21 Follow the instructions in the Calibrator window.
When the calibration is complete, a pop-up window appears with a
message confirming that the ...procedure was completed
successfully.
22 Tap the OK button.