Casio WSD-F20X User Manual page 15

Wake Up
If you don't tap the touch screen for a few seconds, the watch screen will dim.
To wake up the watch and restore it to normal brightness, tap the touch screen
or press the power button.
Power Supply Operations
To do this:
Charge the
watch
Turn off power
Turn on power
See step 1 under
1. While the watch face is displayed, swipe the touch
screen from top to bottom and then tap D.
2. Scroll the screen downwards. Tap "System" and
then "Power off" in sequence. On the confirmation
screen that appears, tap
Hold down the power button for about two seconds, or
start charging the watch. The watch will turn on
automatically when the charge reaches a certain level.
EN-14
Perform this operation:
"Preparing the Watch for First
.
Use".