I have similar issues on my Lenovo X220 Tablet. I've seen this behaviour on countless wacom digitizer screens. Even Wacom's own Cintiq line, which is a screen with built-in digitizer made by Wacom, exhibit the same behaviour. I use a standalone Wacom Intuos for photo editing, and they make the digitizer surface oversized to avoid this problem. But oversizing the digitizer layer is a lot harder (or impractical) to do when attached to a LCD screen. I'd venture to say that this is not a Surface problem, it is a characteristic of the Wacom digitizers. What I've done is increased the system-wide size of text and menus so everything has a much larger landing area, so it is easier to hit. Makes it a lot nicer for using your fingers too. I'm at 125% on my 12.5" screen at 1366x768. I'd probably go a lot higher on a 10.5" screen at 1920x1080.
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