Only the blue screen is projected onto my board or wall and I can see the image on my laptop.
1. Make sure everything is connected correctly.
2. You may have to "tell" the laptop to project through the projector. This varies depending on the model of the laptop.
a. Press the FN and F8 keys. Choose the second graphic to the left that depicts a dual monitor.
b. Make sure the PC button on the document camera is selected