The Size parameter category contains the Zoom Factor slider. This slider controls how far you zoom into or out from the source image. The Zoom Factor ranges from 0.1 to 20. At 0.1, the effect scales down the image to one-tenth the original. At 1, the effect applies no magnification to the source image. At 20, the effect scales up the image 20 times — that is, by 2000 percent. The larger the Zoom Factor, the smaller the field of view rectangle appears when you use Source Display mode.

The Avid Pan & Zoom effect automatically preserves the clip's aspect ratio. Any aspect ratio you select from the Clip menu is also used by the Avid Pan & Zoom effect.