GE PCHB920 Owner's Manual page 9

Surface Units (Cont.)
Sync Burner Feature
This feature allows you to synchronize the left rear and left
front burners to create one large cooking zone for griddle
cooking. To use this feature, press the Sync Burners pad.
You may then use either the left front or left rear + - pads
to adjust the power of both burners simultaneously. To
unsync, press either burner's On/Off pad.
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