Though the pressure sensor built into the watch is adjusted at the factory, and normally does not require correction, you can perform the correction operation below if you notice that readings are very different from those from other sources. You will need another accurate barometer to take current readings at your location, which you can input for correction.

1.What you should do first depends on whether you are starting from a CASIO app or watch face that displays barometric pressure.

• From a CASIO Watch Face:
  While the “Authentic”, “Field”, “Multi”, or “Combination” watch face is displayed, hold your finger on the touch screen for about two seconds until the watch face compresses in size.

• From the TOOL App or Activity App:
  While either app is running, swipe the touch screen from right to left until the “Settings” screen is displayed.

2.Tap . On the setting menu that appears, tap “Barometric Pressure Calibration”.

3.On the barometric pressure input screen that appears, input the current barometric pressure at your location, which was measured by another accurate barometer.

• Tap the digit of the value that you want to change, and then tap or to change it.

4.After the value is the way you want, swipe the touch screen from left to right to return to the setting menu.

5.To close the setting menu, swipe the touch screen from left to right.