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
When moving the target or focusing manually, press the direction keys (+/-
22/Fn1/Fn2) to move the magnified area.