You can export two clips (a Front clip and a
            Matte clip) as a single file with an embedded alpha channel. This
            exported file can then be used as a layer in other compositing or
            editing applications.
         
         To export an RGBA file:
         
         
            - Open the clip library containing the
               clip that you want to export.
            
 
            - Select the Front clip.
            
 
            - While holding down the Ctrl key, select the Matte clip
               (this is to be exported as the alpha channel).
            
 
            - Click Export Image.
               
The Export Image menu
                  appears.
               
             
            - In the File Format box, select a file
               type that supports an alpha channel (such as Targa).
            
 
            - Set the path and filename for the exported
               file.
               
NoteTo avoid filename
                     compatibility issues upon export, underscores will be substituted
                     in your filename in place of any of the following characters: `
                     # ~ @ $ % ^ & * ( ) [ ] { } < > \ | / ! ? , ; : ' " 
                  
                
             
            - Set any additional export options. See 
                        About the Export Image Menu Options.
            
 
            - Click Export.
               
An RGBA file is created
                  from the front clip and the matte clip.