Fro those who have used it before, which position do you "stick" the device on the screen? Roughly in the center? There is no indication at all.
I notice that during the calibration, there are square shapes appearing here and there. So if the device is not placed precisely on screen, won't it affect the calibration process and make it inaccurate?
Thank u!
I notice that during the calibration, there are square shapes appearing here and there. So if the device is not placed precisely on screen, won't it affect the calibration process and make it inaccurate?
Thank u!