Western Digital 4CH TRIPLEX - Manual (Page 20)

4. The selected mode becomes highlighted. Press ESC button to go back to LIVE mode,
and from then the selected recording mode will be applied to recording sessions.
4-3-2. QUAD Recording Mode
1. Select RECORD and press SEL button to go to Select Mode for recording.
2. Select QUAD on the Select Mode screen to go to QUAD setup screen.
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