you can also crop your effect using commands from the crop menu, located below the preview window:

   

    · full screen sets your effect to full-screen size (that is, no cropping is done to the image).

    · crop analog video crops the thin black borders that appear along the edges of video that's been captured from an analog source. these borders typically appear at the right and bottom edges of your image.

    · crop using project defaults re-applies the default cropping values you defined for your project (that is, your general settings in adobe premiere, as explained on page 46).

    · enlarge lets you enlarge the visible area of your image by decreasing the cropping on all edges by a given percentage.

    · reduce lets you reduce the visible area of your image by increasing the cropping on all edges by a given percentage.