As always helping the user, YLovePhoto found direct links to freely download the user manuals for the Nikon D3100.
- Nikon D3100 User’s Manual – English – File Size: ~ 15.8 MB
- Nikon D3100 Manual de Usuario – Spanish – File Size: ~ 16.1 MB
- Manuel d’utilisation du reflex Nikon D3100 – Français ~6,52 Mo