Casio module 5686

1. In the Timekeeping Mode, hold B for at least two seconds, until the Home City name appears; the hands move out of the way.
2. Press C to move through the settings: Home City, summer time, 12/24-hour format, seconds, hour, minute, date format, year, month, day, and more.
3. On the seconds, press D to reset them to 00.
4. On any other time or date setting, press A or D to change it (hold for fast).
5. Press B to finish.

From Casio's guide, page 15

1. In the Timekeeping Mode, hold B for at least two seconds, until the Home City name appears.
2. Press C once to reach the summer time setting.
3. Press D to cycle through AUTO, OFF (standard time) and ON (summer time).
4. Press B to finish.

From Casio's guide, page 15

1. In the Timekeeping Mode, hold B for at least two seconds, until the Home City name appears.
2. Press A or D to change the city (hold for fast).
3. Press B to finish, or press C to go on to the summer time setting.

From Casio's guide, page 14

1. From the Timekeeping Mode, press C three times to reach the Alarm Mode.
2. Press D to pick the alarm, AL1 to AL5.
3. Hold B for at least two seconds, until the hour flashes.
4. Press A or D to set the hour, press C, then set the minutes the same way.
5. Press B to finish.

From Casio's guide, page 17

1. In the Timekeeping Mode, hold B for at least five seconds and release when 00 starts to flash.
2. If the mode hand is not on 00, press A or D to put it there.
3. Press C to move on to the hour and minute hands.
4. If they are not at 12 o'clock, press A or D to set them there.
5. Press B to finish.

From Casio's guide, page 21

1. Press A to light the face.
2. For the duration: in the Timekeeping Mode hold B for at least two seconds, then press C 14 times to show LIGHT.
3. Press D to choose 1 (1.5 seconds) or 3 (3 seconds), then B to finish.
4. For Auto Light, press C 13 times instead to show AUTO, and switch it ON or OFF with D.

From Casio's guide, page 8

1. In the Timekeeping Mode, hold B for at least two seconds, until the Home City name appears.
2. Press C 12 times: KEY♪ or MUTE flashes.
3. Press D to switch, then B to finish.

From Casio's guide, page 23

1. From the Timekeeping Mode, press C once to reach the Stopwatch Mode.
2. Press D to start, D to stop, and D again to resume.
3. While it runs, press B to record a lap; the lap time shows for about eight seconds.
4. When it is stopped, press B to reset it to zero.

From Casio's guide, page 19

1. From the Timekeeping Mode, press C twice to reach the Timer Mode.
2. Hold B for at least two seconds, until the hours flash.
3. Press A or D to set the hours, then press C for minutes and C again for seconds, setting each the same way.
4. Press B to finish.
5. Press D to start, pause and resume; on a paused countdown, press B to go back to the start time.

From Casio's guide, page 20

1. In the Timekeeping Mode, hold B for at least two seconds, until the Home City name appears.
2. Press C three times: the seconds flash.
3. Hold A for at least five seconds and release when RESET stops flashing.
4. Press B to finish.

From Casio's guide, page 23