FujiFilm FinePix S8100fd Owner's Manual page 72

Instant Zoom Instant Zoom
When digital zoom is used
A Set [DIGITAL ZOOM] to [ON] (➝p.111, 112).
AUTO AUTO
Zoom bar
ON
Optical zoom:18
72
Digital zoom:
approx.5.7
B Press
(n) while [DIGITAL ZOOM] is working.
The screen switches to maximum optical zoom scale. The
box appears indicating the area that will be enlarged with
digital zoom.
OFF
C The size of the box changes as you change the digital
zoom scale with the zoom lever.
D Press the shutter button to record the image within the
box.
ON