Pentax Optio A40 Operating Manual page 57

• If you press and hold the OK/Display button for more than 1
second, the LCD Bright Mode is activated. The LCD monitor turns
brighter for a certain amount of time. (1p.36)
• Under shooting conditions where camera shake is likely to occur,
(Anti-shake warning) will be displayed. Take pictures using
the Shake Reduction function or with the camera secured on a
tripod or other stable surface. (1p.57)
• All the camera buttons function as usual even when the LCD
backlight is off. Press the shutter release button to take pictures as
usual.
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