Ricoh Lens A16 - Manual (Page 22)

Caution ----------------------------------------------------------------------------------
Depending on the firmware version that was being used, the setting
for vignetting may be reset to the default when the firmware version is
updated.
Enlarging pictures
Pressing and holding down the MENU/OK button enlarges and displays the
center. Pressing and holding down the MENU/OK button again enlarges
the center and displays the enlarged part over the entire screen. Pressing
and holding the MENU/OK button again returns to normal display. When
focusing manually, press the shutter button halfway to return to normal
display.
You can set the display magnification by pressing and holding down the t
(Self-timer) button or by selecting [Magnification Ratio] from the shooting
menu. Select from [2 Ч], [4 Ч], or [8 ×] using the +/- buttons, and then press
the MENU/OK button.
When moving the target or focusing manually, press the direction keys (+/-
/Fn1/Fn2) to move the magnified area.