LG GT540 Manuel D'instructions page 249

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Camera
Getting to know the viewfinder
Brightness – This defines and controls of the amount of sunlight
entering the image. Slide the brightness indicator along the bar,
towards "-" for a lower brightness image, or towards "+" for a
higher brightness image.
Zoom – Zoom in or zoom out. Alternatively you can use the side
volume keys.
Settings – Touch this icon to open
the settings menu. See Using the
advanced settings.
Image size – Touch to set the size (in pixels) of the picture
you take. Select a pixel value from the numerical options: M
(2048x15), 2M (100x1200), 1M (1280x90), VGA (40x480),
QVGA (20x240).
Focus – Touch this icon to select the options menu. See Using
the focus mode.
Note: You need to insert a memory card first to take a picture. Without
inserting a memory card, you will not be able to save the picture you had
taken.
Gallery –This enables you
to access your saved photos
from within the camera mode.
Simply touch, and your gallery
will appear on the screen.
Taking a photo
Video mode – Slide down this
icon to switch to video mode.