TurboPrint & PrintFab

It may be a dummy questions but how do I tell turboprint to use black AND grey inks only.

If I select "grayscale photo", black and grey are being used but also color inks.
If I select "grayscale", only black ink is being used according to "Ink counters" tab.

Thanks for your help.

Hello,

in "grayscale photo" mode the driver uses black & grey ink plus a bit of color to preserve neutral grey. Color balance can be adjusted using the "color / gray balance" sliders.

Currently there is no "black & gray only" mode available.