PDF (adobe.com)

Create a color matte

  1. In the Project panel, click the New Item button  at the bottom of the Project panel and choose Color Matte.
  2. In the New Synthetic dialog box, set Width, Height, Timebase, and Pixel Aspect Ratio to match these settings for the sequence in which you will use the color matte. Click OK.
  3. In the Color Picker, select a color for the color matte, and click OK.