Casio module 5230

1. In the Timekeeping Mode, hold A for about two seconds until ADJ shows, then release it: the city code scrolls across and the hands move out of the way.
2. Press C to step through the settings: city code, DST, 12/24-hour format, seconds, hour, minute, year, month, day, then button tone, illumination duration and Power Saving.
3. On the seconds, press D to reset them to 00.
4. On the hour, minute, year, month or day, press D to go up and B to go down.
5. On the city code, press D to move east or B to move west; on DST, press D to cycle through AUTO, OFF and ON.
6. On the 12/24-hour format, press D to switch between 12H and 24H.
7. Press A to leave the setting mode; the hands move to match the digital time.

From Casio's guide, page E-48

1. In the Timekeeping Mode, hold A for about two seconds until ADJ shows, then release it.
2. Press C to reach the DST setting.
3. Press D to cycle through AUTO, OFF (standard time) and ON (summer time).
4. Press A to go back to the Timekeeping Mode. The DST indicator shows while summer time is on.

From Casio's guide, page E-45

1. In the Timekeeping Mode, hold A for about two seconds until ADJ shows, then release it: the city code and name scroll across.
2. Press D to move east or B to move west through the city codes.
3. Press A to go back to the Timekeeping Mode.

From Casio's guide, page E-42

1. Press C until the Alarm Mode shows (ALM).
2. Press D until the alarm you want shows (AL1 to AL5).
3. Hold A for about two seconds until the alarm time flashes; the hands move out of the way.
4. Press D to go up and B to go down; press C to move between the hour and the minutes. In 12-hour format, mind a.m. (no indicator) or p.m. (PM).
5. Press A to leave the setting mode.
6. If the alarm ON/OFF indicator is off, press A to turn the alarm on.

From Casio's guide, page E-64

1. In the Timekeeping Mode, hold A for about five seconds: ADJ shows first, keep holding until H.SET shows, then release. The hands move to 12 o'clock.
2. If the hour and minute hands are not both exactly at 12 o'clock, press D or B to move them there (hold for fast; press any button to stop the fast movement).
3. Press A to go back to the Timekeeping Mode, then check that the hands match the digital time; repeat if they do not.

From Casio's guide, page E-75

1. Press B in any mode to light the face.
2. To switch the auto light on or off (it lights the face when you tilt the watch towards you in the dark), hold B for about three seconds in the Timekeeping Mode.
3. To change the duration: in the Timekeeping Mode hold A until ADJ shows, release it, then press C until LT1 or LT3 shows.
4. Press D to switch between 1.5 seconds (LT1) and three seconds (LT3), then A to leave.

From Casio's guide, page E-68

1. In the Timekeeping Mode, hold A for about two seconds until ADJ shows, then release it.
2. Press C until KEY♪ or MUTE shows.
3. Press D to switch between KEY♪ (beep on) and MUTE (beep off), then A to leave.

From Casio's guide, page E-81

1. Press C until the Stopwatch Mode shows (STW).
2. Press D to start, D to stop, and D again to carry on.
3. When it is stopped, press A to reset it to zero.
4. For a split time, press A while it runs (SPL shows); press A again to let the display catch up.

From Casio's guide, page E-58

1. Press C until the Countdown Timer Mode shows (TMR).
2. If a countdown is running, press D to stop it, then A to reset it to the start time; if it is paused, just press A.
3. Hold A until the minutes flash; the hands move out of the way.
4. Press D to go up and B to go down; press C to move between the minutes and the seconds.
5. Press A to leave the setting mode, then D to start the countdown.

From Casio's guide, page E-60