Magnavox ZV457MG9A Owner's Manual page 70

You can select the format of audio and video as you prefer depending on the contents of the disc you are playing back.
DVD-video may have subtitles in 1 or more languages.
Available subtitle languages can be found on the disc
case. You can switch subtitle languages anytime during
playback.
1)During playback, press [DISPLAY] to bring up the
display menu.
2) Use [<1 / I_] to select/i_ to display the selection
menu.
e.g.) DVD-video
3) Use [A /V] to select a desired subtitle language,
then press [OK].
When playing back a DVD-video recorded with 2 or more
soundtracks (these are often in different languages), you
can switch them during playback.
When playing back video CD, audio CD you can switch
"L/R"(stereo), "L"(left) or "R"(right).
1)During playback press [DISPLAY] to bring up the
display menu, then proceed to
step 2), or press [AUDIO] then proceed to step 3).
• If the display menu is already shown, skip to step 2.
2) Use [<1 / I_] to select _ to display the selection
menu.
3)Use [A IV] to select a desired audio soundtrack or
audio channel, then press [OK].
For DVD-video
• Audio soundtrack will switch.
Subtitle will be displayed in the selected language.
When selectinc "OFF", subtitle will disappear.
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• If the title contains both main and sub audio, you can
further select "L" (main), "R" (sub), or "L/R" (mixed of
main and sub).
For audio CD, video CD
• Audio channel will switch.
e.g.) audio CD
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