iDVD '09 (7.x): Testing a DVD you created
You can test your project before you burn it by saving it as a disc image. The disc image of your project is a fully encoded version of the project that you can play in DVD Player (which comes on your Mac) or burn to a disc later. You can preview the disc image to make sure your project plays correctly and then make changes, if necessary, before burning a disc.
To create a disc image of your project:
Choose File > “Save as Disc Image.”
Type a name for the disc image.
Choose where you want to store the disc image.
Double-click the disc image icon when the disc image is ready.
DVD Player opens and you can view your DVD on your computer. If everything works, the DVD you burn will work in most newer consumer DVD players and computers with a DVD drive.
Note: If you burn your project to a double-layer disc, you should burn directly from iDVD rather than from a disc image. Burning from a disc image may cause the DVD to freeze on some DVD players.