NEC WT615 - Manual (Page 53)

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3. Press the SELECT
̆
or
̄
button to select [Pen Calibration] and press the ENTER button.
One “O ”mark will be displayed on the screen.
4. Touch the circle “O” mark lightly with the electronic pen.
Another “O” mark will be displayed on the screen.
Use the same procedure each time a circle "O" mark appears until you touch all the marks.
Your calibration settings are now saved.
This completes “Pen Calibration”.
NOTE: Hold the electronic pen upright against the screen when using it. Otherwise, the actual movement of the electronic pen
may not be displayed on the screen.
3. Projecting an Image (Basic Operation)
Touch