ColorFlow 7.5 includes simplified curve creation and application. You can now use ColorFlow (rather than Harmony) to create curves from measured targets. In Prinergy, you can then use these ColorFlow curves for tonal calibration in exactly the same way as Harmony curves. In Prinergy 7.5, you no longer need to enable a color setup in order to use ColorFlow tonal calibration curves. If you use a spreadsheet of numbers to create curves (i.e. node-based curve creation), Harmony is still the best choice to create these types of curves.