How to access all my camera features

May 30, 2020
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I just bought a {used) Nikon D3400 w/ AF-P DX NIKKOR 18-55mm f/3.5-5.6G VR that has no instruction book and figured out how to turn off the "Auto" feature so that all other features should be accessible but some are still grayed out so I can't adjust them. How do I fix this? Thank you all in advance,this is my first DSLR and I'm anxious to get into it.
 

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