Samsung PN51F5300BFXZA - Manual (Page 105)

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Button Operation
Settings
Subtitle Settings : Lets you play a video with subtitles. This function
only works if the subtitles have the same file name as the video. For
example, Bats.mp4 and Bats.smi.
Picture Mode / Sound Mode : Lets you select the picture or sound
mode ( Dynamic , Standard , etc./ Standard , Movie , etc.)
Information : Lets you see detailed information about the file being
played.