Here you’ll find a PDF version of the Nikon D7000 user’s manual.
This short YouTube video by Dan Watson of LearningCameras.com covers the issue of not being able to change the aperture in live view on the Nikon D7100 (and D7000).
Looking for a good overview of the Nikon D7000 and its features? Check out Nikon’s D7000 Digitutor.
Here you’ll find a link to a handy cheat sheet for the Nikon D7000 DSLR camera by the folks at For Dummies.