On the Nikon D7000, how do you properly lock the camera's white balance and metering?

I see a button for it, but it doesn't seem to be very self explanatory.

Added (1). I need it for a panorama.

It is not desirable to lock the white balance. This varies from shot to shot.

Absolutely… Why would you want to. You apparently don't understand one of the very basics of photography - each shooting situation is unique - get what I'm saying. Stand outside, aim and shoot.
I guarantee you that if you turn 90 degrees and do it again the settings will be different.

Don't ever lock any settings.

White Balance: I'm not used to the D7000, but I believe it has a white balance button on the rear - press this, take it out of "auto" and set it for the conditions you are in manually.

For what you are attempting the AE-L/AF-L button is not going to do what you want! You'll have to put the camera into manual mode and use it's metering so you can set the aperture and shutter speed as you desire. You just do that for the whole area of the panorama ONCE, and then take all your shorts with those same setting.

*when taking panorama shots the smaller the aperture the greater the depth of field. So you may want to use a small aperture and slow shutter speed with the camera on a tripod.

**Manual mode isn't complex, on modern cameras it's extremely straight forward, it just takes that little longer to do!

The White Balance button on the d7000 has 2 functions, it also acts as a LOCK button to protect photos in viewing mode.

There's no such thing as locking White Balance. Just set to auto, it is usually reliable.

Hi
To know about your nikon d7000 white balance setting
just go to the link below you can know all the setting about your camera!

http://www.imaging-resource.com/PRODS/D7000/D7000A5.HTM

or need the practical watch the video Thur this link

try this this is my own research
don't forget me!

For panorama shooting, you need to:
1. Use the Manual setting for your exposure. You set the shutter speed and aperture manually. When setting exposure, set your exposure for the brightest area you want properly exposed.

2. Use a fixed white balance. See page 117 in your manual on how to set the white balance.

3. Overlooked is setting your focus to manual. I use the autofocus feature on the camera, then set the camera or lens to manual focus. If you focus on different areas, the magnification changes slightly.

If you have vast lighting differences, you can do exposure bracketed panos. Hugin is one such program that can handle HDR panos. Hugin is free and gives excellent results.