Selecting the recorded pixels of still pictures, P.83, Press the menu button in capture mode – Pentax Optio A20 User Manual
Page 85: Press the four-way controller ( 5 )

83
Ta
kin
g
Pictur
es
4
You can select the number of recorded pixels from [10M], [7M], [5M], [3M], [2M],
[1024] and [640].
The more pixels there are, the larger the picture and the file size. The file size also
varies depending on the quality level setting (1p.85).
Number of Recorded Pixels
1
Press the MENU button in Capture mode.
The [A Rec.Mode] menu appears.
2
Use the four-way controller (23)
to select [Recorded Pixels].
3
Press the four-way controller (5).
The pull-down menu appears.
Selecting the Recorded Pixels of Still Pictures
10M (3648×2736)
7M (3072×2304)
For printing images with high-resolution settings in your printer,
printing at A4 size or larger, or editing and processing images
5M (2592×1944)
3M (2048×1536)
For printing at postcard size
For using as images on websites, or attaching images to e-mails
2M (1600Ч1200)
1024 (1024Ч768)
640 (640Ч480)
Rec. Mode
MENU
Exit
Recorded Pixels
Quality Level
White Balance
AF Setting
AE Metering
Sensitivity
AWB
10
M
AUTO 800
MENU
Shutter release
button
Four-way
controller
MENU button
Cl
ear
, F
in
e
Rec. Mode
MENU
Exit
Recorded Pixels
Quality Level
White Balance
AF Setting
AE Metering
Sensitivity
AWB
10
M
AUTO 800