This control displays and adjusts the alveolar ventilation (VA), given in liters per minute.

Click on the edit box to edit the ventilation setting directly (double-click to select the number to overwrite). The number here will display in red when it exceeds the value at the top of the gauge.

The upper and lower 'spin-buttons' increase and reduce the alveolar ventilation (VA) setting. Click to adjust; hold down to adjust continuously.

Alveolar ventilation (this number) will increase naturally with uptake when Uptake is enabled in the Special Menu or on the Control Panel.