A button

Pressing this button in any mode displays the setting screen.

Some watch models are designed so their (A) button is recessed more than the other buttons.

C button

Each press cycles between watch modes.

Pressing this button after performing operations in any mode returns to the Timekeeping Mode.

B button

Press to turn on illumination.

D button

Holding down this button for at least two seconds in the Timekeeping Mode toggles flash alert between enabled and disabled.