GE G1 - Manual (Page 26)

   
ISO
The ISO function allows you to set the camera
sensor sensitivity to light. To improve the
performance in darker environments, a higher
ISO value is required. On the other hand, a
lower ISO value is needed when in bright
conditions.
To set the ISO value, do the following:
1. Press the
button to enter the Function
menu.
2. Use the Left/Right navigation buttons to
highlight the ISO function.
Higher ISO pictures will naturally have
more noise than lower ISO pictures.
3. Use the Up/Down navigation buttons to
select the desired ISO value from Auto,
80, 100, 200, 400, 800, or 1600.
4. Press the button to confirm your
setting.
Quality
The quality setting adjusts the compression
ratio of the images. Higher quality settings
give better photos, but will take up more
memory space.