Yesterday I got my Nikon D5100. After initial setup, I clicked a picture. All okay. Then to learn, I pressed the 'i' button to view the settings. Now I am not able to come out of this information display on my screen. To take a photo I have to see through the viewfinder. I can't see that on my screen/monitor. I can still take pictures and review them. How do I bring back my screen to see the shooting mode?
You should be able to press the button again to come out of the info display (or it may take two presses). On my D700, pressing the shutter button part way turns the LCD off.
However, if you want to view the "to be taken" photo from the LCD, you want to press the button for Live View (check your owner's manual, as the D700 doesn't have this - my old D90 did -probably labelled "LV") and that will display what you are point at, like a P&S camera.
You'll want to read up on Live View, if that's what you want to do.
On page 44 on http://www.nikonusa.com/pdf/manuals/dslr/D5100_EN.pdf it says the live view switch can be moved towards the rear of the camera to engage the live view mode. The live view mode will lift the mirror allowing you to frame your shot using the lcd. However, because the mirror is raised you will probably not be able to use the viewfinder while in live view.
Hope this helps.
I do not own any Nikon camera all my advise comes from a quick look at the manual from the provided link