Area zooming

qpx_ZoomToFitHorz -1 Adjust zooming so that the image fits within the plug-in area horizontally. The result zooming will not be greater than 100% (normal size).
qpx_ZoomToFitVert -2 Adjust zooming so that the image fits within the plug-in area vertically. The result zooming will not be greater than 100% (normal size).
qpx_ZoomToFit -3 Adjust zooming so that the image fits within the plug-in area both horizontally and vertically. The result zooming will not be greater than 100% (normal size).
qpx_ZoomToFill -4 Adjust zooming so that the image fills the plug-in area horizontally and vertically. The result zooming will not be greater than 100% (normal size).
qpx_ZoomCanStretch -8 When added to the other zooming constants, allows zooming to be greater than 100%.