The Compare screen has three important sections:
the Backup Set Catalog drop-down list box, and
the Compare From and Compare To combination
boxes. The Backup Set Catalog designates which
master catalog you are currently working with.
The Compare From combination box designates the
drive which the backup files will be read
(usually floppy disks). The Compare To
combination box defines where to compare the
backup files to (usually you would compare a
backup set to its original locations; for the
DOS directory backup set, choosing Original
Locations would compare the backup files against
the files located in the C:\DOS directory.)

Use the default settings for the combination
boxes for the DOS directory backup disks.  The
Compare Files option will be set to All Files
since you want to compare all the files from the
DOS directory backup.

To set the Compare Files option to All Files,
highlight the C: drive icon immediately below
the Compare Files label.  After this option is
set, you're ready begin the Compare operation.

When you're ready to compare, press Enter.