When building a Viewer title, you can tell Viewer to optimize the title for CD-ROM by aligning topic files on predefined block boundaries. This optimization allows Viewer to read data from the CD-ROM faster and more efficiently.
To optimize a title for CD-ROM, enter the OPTCDROM option in the [OPTIONS] section of your project file. This option can have any of the following forms:
OPTCDROM = YES
OPTCDROM = TRUE
OPTCDROM = 1
OPTCDROM = ON
The only disadvantage to using OPTCDROM is that it slightly increases the size of the .MVB files. However, given the large storage capacity of a CD-ROM, the extra file size is usually not significant.