Magnavox ZV457MG9 Owner's Manual page 54

To prevent accidental recording, editing or erasing the
titles, you can protect them from "Disc Edit" menu.
SETUP
1
2
3
Press [SETUP].
Use [A / v] to select "Disc Edit", then
press [OK].
Use [A /V] to select "Disc Protect
OFF _ ON", then press [OK].
e.g.) DVD+RW
ii i
C
Use [A /V] to select "Yes", then press
[OK].
A disc will be protected.
52 EN