Why do I need to calibrate before I use the interactive pens for the first time?

• Calibration coordinates the positioning of the pens with the location of your cursor. You need to calibrate only the first time you use your projector, and you do not need the pens or a computer for calibration.

  Note: You should not need to calibrate again unless the projector or image is moved, the image is resized, or you perform Geometry Correction.