Casio EXILIM EX-Z77 User Manual page 60

2.
Focus the image.
While the focus frame is aligned with the subject, half-press
the shutter button.
Auto Focus will focus the image automatically, and the focus
frame and operation lamp will turn green. The aperture,
shutter speed, and ISO sensitivity also will be set
automatically.
Shutter Button
Operation Lamp
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3.
Shoot the image.
When the image is focused, press the shutter button the rest
of the way.
Shutter Button
This will shoot the snapshot and save it to the memory card
or the camera's built-in memory.
SHOOTING A SNAPSHOT