With a complicated watch such as the Casio G Shock, it can be difficult to figure out how to set the time. But a few brief steps will take you through the process.
Hold down "A" until the city code flashes while the watch is in timekeeping mode.
Press "C" to scroll through the time setting options. You will see "Hour" and "Minutes," among other options.
Press "D" when the option you want to change is flashing.
Press "D +" to change the hour and minutes.
The analogue time is synchronised with the digital time. If you change the digital time, the analogue time also changes.