Quiet Shutter Release - Nikon D3400 Reference Manual

Quiet Shutter Release

Choose this mode to keep camera noise to a minimum. A beep
does not sound when the camera focuses.
1
Press the I (E/#) button.
2
Select J (Quiet shutter release).
Highlight J (Quiet shutter release)
and press J.
3
Take photographs.
Press the shutter-release button all
the way down to shoot.
I (E/#) button
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