Beyonwiz DP-S1 - Manual (Page 63)

File Playback Function
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2) Subtitle
The DP-S1 can decode and display subtitles from a subtitle file. To play
a movie with subtitle, please copy the subtitle file to the same folder of
the movie file and give the same file name as the movie file. The DP-S1
automatically display subtitle when you play a movie with the OK or
PLAY button.
You can hide the subtitle if you do not want to display. Please press the
SUBTITLE button and press the OK button. You can also display the
subtitle in the same manner.
You can adjust the position of the subtitle with the UP/DOWN buttons
while the subtitle control window is displayed. If the subtitle is out of
sync, you can adjust the sync with the LEFT/RIGHT buttons.
NOTICE
z The DP-S1 support the following subtitle formats; smi, sub and srt.