The possible values of PixelOffsetMode are:
Invalid
Default
HighSpeed
HighQuality
None
Half
I'm guessing that HighQuality = Half, HighSpeed = None and Default = HighSpeed.
If this is true then, like the SmoothingMode, I can offer just two simple options.
Does anyone know if this is correct and, if so, where on earth did you find the information?
Thanks