I had to disable the DELPHI_TOUCH switch for better tablet operation for our users to be more like it was in the the older WPTools (specifically WPTools 5). However, this prevents a finger scroll of the Print Preview window.
I did find a way to get it to work. However, I have to use two fingers, and my customers want a single finger scroll capability (they are inspectors, and the way they hold a tablet and other tools, they would like to use one hand to hold the tablet and scroll at the same time with the same hand, such as with their thumb like you typically do on phone. Either that, or they might be holding another tool in the other hand and can only manage one finger on that other hand to control the tablet without first putting down that tool. Try it... hold a flashlight in one hand, the tablet in the other and try a two finger scroll.
I had to add this to the TWPPreviewForm.FormCreate to at least allow a two finger scroll, but it is not good enough:
WPPreview1.Touch.InteractiveGestures := [igPan, igZoom];WPTools 9.2.001
Delphi 10.4.1