Gear: Wacom DTU-1031, Lenovo ThinkPad X230T, Tablets, Wacom Tablets.
In short, use Windows Mobility Center for Windows powered laptops and tablets. For the Wacom DTU-1031 use "Wacom Tablet Properties". The increase in brightness helps reduce the graininess of the screen. The DTU-1031 tablet has a default brightness of around 70 to 80 percent, which in my opinion is not enough. Increase it for a more pleasant experience.