Beyonwiz DP-S1 - Manual (Page 84)

File Playback Function
74
2) A-B Repeat
The DP-S1 can play a certain section (A-B) repeatedly.
Please activate the progress bar with the OK button. Place the lower
anchor mark at the start position and press the YELLOW button. A new
anchor mark with “A” will indicates the start position. Move the lower
anchor mark at the end position and press the YELLOW button. A new
anchor mark with “B” will be displayed and stat to play from “A” to “B”
automatically.
The DP-S1 will play A-B repeatedly until you press the YELLOW button
and cancel it.
NOTE
z The “A-B Repeat” function does not work for some types of content.