To show or hide the Apple logo watermark:
Choose iDVD > Preferences.
Click General.
Select or deselect the “Show Apple logo watermark” checkbox.
You can choose whether the Apple logo watermark is displayed on your iDVD projects. When it is present, the logo appears in the lower-right corner of all menus.
Choose iDVD > Preferences.
Click General.
Select or deselect the “Show Apple logo watermark” checkbox.
Your choice affects all of the iDVD projects you have stored on your hard disk. For example, you may have projects that you created without the watermark. If you change your preference to include the watermark, the next time you open those projects, they will show the watermark.