The document provides instructions for creating a magic revealer in ActivInspire. It explains that you first add media objects to hide in the middle layer and cover them with an image in the top layer. Then, a rectangular shape with no fill and thick border is created and the inside erased with the magic ink tool. The shape and ink are grouped and placed over the cover image. Finally, the cover image is duplicated and sent to the background layer before turning off design mode.