System information
7.
Click the Compositing Mode button to set the title track to Source Alpha (default).
Notes:
n If your title is saved as a TGA image, the alpha channel may not be detected
automatically. Use the Media Properties dialog and choose a new setting from the
Alpha channel drop-down list. For more information, see "Viewing or Changing Media
File Properties" on page 110.
n If your image does not have an alpha channel, you can apply the Chroma Keyer filter
to the image to key out the background.
APPLYING EFFECTS329