How to Restore Default Settings on the Nikon D3300
You can quickly reset all the options on the Nikon D3300’s Shooting menu by selecting Reset Shooting Options, as shown on the left in the figure. Likewise, the Setup menu also has a Reset Setup Options item to restore all settings on that menu, as shown on the right.
A few potential flies in the ointment:
Resetting the Shooting menu defaults wipes out any customizations you made to a Picture Control setting — for example, if you tweaked the Vivid setting to produce even more saturated colors than it does by default.
Additionally, a Shooting menu reset restores the default settings of a couple options not on the menu, including the Release mode, Exposure Compensation, Flash Compensation, Flash mode, Focus mode, and selected focus point. Finally, the AE-L/AF-L button returns to its normal operation as well.
More worrisome is that resetting the Setup menu restores the File Number Sequence option to its default, Off, which is most definitely Not a Good Thing. So if you restore the menu defaults, be sure that you revisit that option and return it to the On setting. See the preceding section for details.
Resetting the Setup menu does not affect the Video Mode, Time Zone and Date, Language, or Storage Folder options. So you need to adjust those settings individually if necessary.