To edit the bit settings for a DVD recorder, proceed as follows:    
1.
If there are several optical drives available, select the one you want in the drop-down menu.
2.
Click Extra > Bitsetting.
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The Nero DiscSpeed – Bit Setting window opens. The Drive settings area shows the disc types, as well as the respective book types. 
3.
Change a book type in the corresponding New setting drop-down menu and click the Set button.
4.
If you want to retain the modified book type setting as the default setting for the optical drive, enable the Set as default check box.
5.
Click the Refresh button.
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The display in the window will be refreshed. The Drive settings area shows the disc types and the modified book types as a selection under Book Type.
6.
Click the Close button.
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You have changed the bit settings for a DVD recorder.
Book Type
The book type defines the specification (e.g. DVD-, DVD+, DVD-ROM) of a DVD. In order to ensure correct playback, the DVD specifications are defined in books so that all media can be read correctly. The specifications are defined in the so-called Rainbow Books, which are distinguished by means of their color (e.g. Yellow Book).
Disc type
Disc type refers to different optical storage media with different specifications. The best known are CD’s and DVD’s that can be written to once or multiple times, and which are manufactured with different storage capacities.


Changing the Bit Setting