Select a video file in the storyboard, and click the button to open the Edit window, and

click the Effect tab to set video effects of the selected video file:

• Video effects
  
  Brightness: Drag the Brightness adjustment slider to set the brightness of the video.
  
  Contrast: Drag the Contrast adjustment slider to set the contrast of the video.
  
  Saturation: Drag the Saturation adjustment slider to set the saturation of the video.
  
  
  
• Volume: Drag the Volume adjustment slider to set the volume of your movie audio.