The ‘Drag Threshold’ does not have documentation in 5.3.3 though the online doc says it is ‘The soft area for dragging in pixels.’
I’m guessing that means the number of drag pixels before a touch becomes a drag?
Also the default is 5 which is surely far too small on a modern phone - e.g. the S7 with 577 ppi.
I imagine it would be better defined as a real-life measurement than number of pixels to counter differences in pixel density?