Lenovo C315 All-In-One - Manual (Page 26)

21
User Guide
3. When the calibration screen appears, use your finger to touch each of the 4
calibration points that are shown in sequence. After finishing these operations,
the calibration screen will disappear, and the screen calibration is complete.
Please touch the target point shown on the display.
Attention: While in use, whenever the touch screen reacts in a different
place from where you are touching it, or it stops reacting, just start the
calibration program.