Now, if you are a landscape photographer that day, and you so wish to underexpose your scene by a couple of EVs (to soak in richer details), you can do so without your eyes leaving the viewfinder. Simply turn menu B2 Easy Exposure Compensation to "ON".
Compose your picture, and turn the front grip Nikon D90 scroll wheel to over or under expose the scene. Press the shutter release to fire away! Its that simple. Gone are the days where you need to adjust the EV via the EV button next to the LCD display panel.