Pentax Optio S5z Operating Manual page 71

Setting the Digital Zoom
The digital zoom is set to O(On) in the default settings. To take pictures
using only the optical zoom, set the digital zoom to P(Off).
1
Press the MENU button in Capture mode.
The [A Rec.Mode] menu appears.
2
Use the four-way controller (23)
to select [Digital Zoom].
3
Use the four-way controller (45)
to select O (On)/P (Off).
4
Press the shutter release button
halfway.
The camera is ready to take pictures.
You cannot use the digital zoom in Special Effect mode.
Saving the Digital Zoom Function Setting
Rec. Mode
EV Compensation ±0.0
Movie
Digital Zoom
Aux. AF Light
Instant Review 1 1 sec
Memory
Exit
MENU
1
p.96
4
69