Write on the screen with your finger or a pen, and erase Touch the screen to navigate through documents, videos, presentations, or websites Make notes, draw shapes, move, scale, or rotate the images with a finger touch Save your notes, graphs, text, e-mail, or share them Record instructions as video files and post the materials for review by student* Control the PCs / tablets in the classroom from the display* * These functions are available with the appropriate optional software.