When
            you crop media, the front and matte clips are cropped together.
            You cannot crop the back clip. If you applied the media to more
            than one surface, all the surfaces are cropped.
         
         You can animate a crop
            by changing the size and shape of the Crop box at different keyframes.
            You can also animate the softness of the Crop box.
         
         NoteAnimating a crop
               in the Channel Editor does not enable the Crop field in the Media
               list.
            
         To crop a clip with the Media list:
         
         
            - In Action, click Media.
            
- Set values for cropping and softness
               in the Top, Bottom, Left, and Right fields. Once you set a value
               in one of the Crop or Softness fields, white checkmarks indicate
               that Crop and Softness are enabled.
               TipAlt-drag over one of the fields
                     to change all four values proportionally.
                   
To crop gesturally in the image window:
         
         
            - Double-click the Crop field to enable
               Crop and Softness.
            
- In the View box, select Media Front or
               Media Matte.
               The clip appears in the
                  image window with a red outline, which indicates the Crop box, and
                  a green outline, which indicates the Softness box.
                TipYou can use two viewports
                     to view the crop interactively on both the front and the matte clips.
                   
- Set the corners of the Crop box and Softness
               box by dragging either the corners or edges of the red and green
               outlines.
               The crop and softness
                  values in the Media list are updated as you drag.
                
- Click Result.
               The cropped media appears
                  in the image window, and the front and matte clip share the same
                  crop.
                
- To mute the Crop and Softness values,
               double-click the Crop field. To mute only the Softness, double-click
               the Softness area of the Crop field. When muted, a black checkmark
               appears in the Crop field.