This control displays and adjusts the vaporizer output, given in percent atmospheres.
Click on the edit box to edit the vaporizer 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 vaporizer (DEL) setting. Click to adjust; hold down to adjust continuously.
The vaporizer adjustments differ from most of the other controls in the Picture view: They don't necessarily change all the other DEL settings in other views to match. (see Multi-agent Simulations for an explanation).