Where to find it
You can keep track of your exposures using a histogram at every stage in an image’s life
Going live 1
You can see a histogram when you’re shooting with the Live View display, recording movies or using an electronic viewfinder.
Play your cards right 2
You can view colour histograms as well as the brightness histogram when you play back your images. (More on that later…)
Screen test 3
The histogram in raw processing software such as Lightroom changes shape in real time as you make adjustments.