Nikon D3200 Reference Manual page 40

If On is selected, the information display will appear after the shutter-release button
is pressed halfway; if image review (_ 126) is off, it will also be displayed immediately
after shooting. Choose On if you find yourself frequently referring to the information
display during shooting. If Off is selected, the information display can be viewed by
pressing the _[I, button.
When connecting the camera to a television or VCR, be sure the camera video mode
matches the device video standard (NTSC or PAL).
Reduce flicker and banding when shooting under fluorescent or mercury-vapor
lighting during live view (_ 80) or movie recording (_ 88). Choose Auto to allow the
camera to automatically choose the correct frequency, or manually match the
frequency to that of the local AC power supply.
Flicker Reduction
If Auto fails to produce the desired results and If you are unsure as to the frequency of the
local power supply, test both options and choose the one that produces the best results.
Flicker reduction may not produce the desired results with some subjects, in which case you
should select mode A or M and choose a smaller aperture (higher f-number) before starting
live view. Note that flicker reduction is not available when On is selected for Movie settings
> Manual movie settings (_ 91) in mode M.
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