Pentax Optio M20 Operating Manual page 103

6
Use the four-way controller (23) to change the number
of recorded pixels.
Recording time for the selected recorded pixels is displayed when the
Recorded Pixels setting is changed.
7
Press the 4 button.
The Recorded Pixels setting is saved.
8
Press the 3 button twice.
The camera returns to capture status with the current setting.
Recorded Pixels, Quality Level and Frame Rate of Movies 1p.30
4
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