Tablet calibration button grayed out
I wanted to calibrate my tablet (Microsoft Surface Pro 3, Bluetooth pen). However, in the corresponding settings menu, the button was grayed out for no apparent reason. Only weeks later, I found out by chance that this depends on the "Map to Monitor" setting: if it is set to "Automatic" then the calibration button is available, otherwise it is grayed out.
Now that I know this it partially* makes sense, however it should be communicated more clearly.
* If I set the option to map to "All Displays" it kind of makes sense to disable calibration (because how would that work?). But if I set the option to the currently used display (which ends up being the same thing as "Automatic"), I don't see why the button would be grayed out there.