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Shortly after I started using Windows 8, I noticed click & drag behaves differently when using a mouse vs a stylus.

With a mouse, the drag begins at the location where the cursor was when the button was depressed:

Demo of a drag with mouse - selection box starts at point of click

With a stylus, it appears that the drag isn't recognized until the cursor has traveled 10 pixels from where it first pressed:

Demo of a drag with stylus - selection box starts after pen has moved 10px right

(In the examples above I'm using Greenshot to try to screengrab a rectangle whose upper-left corner starts at the crosshairs in the background. I also encounter the issue in the Unity editor)

I'm guessing this was done to support the new touch features - when using an imprecise finger on a touchscreen, a user wouldn't want slightly wiggly clicks being interpreted as swipes.

But when using a more precise input device like a stylus, this can be quite disruptive. In drawing programs, a drawn stroke will fail to replicate the input stroke by a noticeable gap. When trying to drag items from a list view, the 10px error is enough to grab an adjacent item in the list instead of the intended one.

When I was using a Wacom tablet, the recommended fix was to go into the Wacom tablet settings and disable "Use Windows Ink"

Unfortunately, my current problem is with the pen that came with my Surface Pro 3, so twiddling Wacom settings isn't available here.

  • I suspect this has to do with more with the Pen then anything. But, twiddling the settings is possible, just have to go through the normal windows way. Windows Ink might or might not be possible to disable, wouldn't want to do that, might want to try the current Inside Preview since Windows Ink is a huge priority. – Ramhound Apr 9 '16 at 23:20
  • The article might be for Surface Pro 3, if that is the case, then it is indeed the hardware not the software. – Ramhound Apr 9 '16 at 23:24
  • @Ramhound I doubt it's intrinsic to the hardware for a couple of reasons: 1) identical symptoms with Wacom tablets had a software solution, 2) Windows's own desktop drag selection works correctly with the stylus. I suspect that Windows is applying some software processing to the stylus input to interpret it for programs that aren't Ink-aware, and unfortunately it's processing it like a finger instead of like a mouse. That, to me, sounds like something I might be able to fix through a registry setting or driver fiddle. Unfortunately the configuration panel you link does not expose this option. – DMGregory Apr 10 '16 at 0:44
  • Must have sent you in the correct direction though :-). Was leaning towards the pen pressure sensitivity differences between SP3 and SP4 and wacom tablets hence my comment – Ramhound Apr 10 '16 at 1:14
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Aha! Turning off Pen Flicks seems to correct for this.

Type "pen" in Start menu and select "Pen and Touch" from the results Go to the "Flicks" panel and uncheck "Use flicks..."

(I thought I'd done that when I first started using this machine - it's part of my usual checklist of disruptive Windows defaults to undo - but it looks like I missed it on this device)

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