Matrox Axio Installation And User Manual page 125

If you can't set the pixel aspect ratio, create your image at 864×486 for
NTSC or 486p video, or at 1024×576 for PAL or 576p video. After you've
created your image, resize only its width to 720. When you resize the image,
your text or graphic will appear elongated on your computer screen.
Edit your project as you would a standard 4:3 project.
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¦ Note Be aware that if your video monitor is displaying in 4:3 format, certain
effects may appear elongated because of the horizontal scaling. Setting your
monitor to 16:9 will display the effects with the correct proportions.
Record your finished project onto tape. Remember that you'll need a
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monitor capable of displaying material in 16:9 format to properly view your
master tape.
Creating an SD project in 16:9 format
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