Casio GB-6900B User's Manual For Watch Functions page 8

Illumination. . ......................................................................................................... E-44
To illuminate the display .................................................................................E-44
About the Auto Light Switch ...........................................................................E-45
To turn the auto light switch on and off ...........................................................E-46
To specify the illumination duration .................................................................E-48
Other.Settings...................................................................................................... E-50
To turn the button operation tone on or off .....................................................E-50
To change the alarm/timer alert method .........................................................E-52
Low.Battery.Indication. . ....................................................................................... E-54
Specifications...................................................................................................... E-56
Operating.Precautions. . ....................................................................................... E-60
User.Maintenance. . .............................................................................................. E-70
E-7