The pen is causing interference and unwanted effects. What should I do?

• If the pens are causing interference or unwanted effects, try the following solutions:
  • When two pens are used at the same time, make sure they are approximately 4 inches (10.16 cm) apart.
  • Do not rest the pens on the image area of an interactive table, to avoid interference with your computer's mouse.
  • Make sure that nothing is blocking the direct line to the infrared site.