As Bill has stated if you have contol valves "knobs" at the hydraulic pump in the battery compartment you can close down the others and open only one slide at a time.
Note: If the valves have pressure on them they may be hard to turn so bump the switch the opposite way just a little to remove some of the pressure.
The Main is the living room, Kitchen and bedroom.
Hope this helps.
Merry Christmas.
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