Located under the Capture tool tab, the Exposure Evaluation tool displays a histogram of the latest captured image. With RAW files, the histogram displays the actual raw data with a tone curve applied as set up in the Base Characteristics tool. The histogram will not be updated after any other adjustments have been made (with the exception of any white balance correction) as it refers to the original exposure. However, adjustments will be reflected in other histograms such as those found in the Levels and Curves tools.
An Exposure meter is located directly below the Exposure Evaluation histogram. This meter provides an indication of under/overexposure that is based on a center-weighted measurement and is displayed with a scale denoting ±2 EV. This meter is designed to be easily seen at long viewing distances and to make estimating the exposure easier when shooting tethered in a studio or on location.