With the camera in a capture mode, the up arrow cycles from the default display that superimposes the flash mode, the image resolution, the number of images that can be captured, the memory storage (card or internal), the current exposure setting, and the capture mode around the periphery of the image, while at the centre the AF brackets show the focus zone. Pressing the up arrow once clears the monitor of all information with the exception of the exposure compensation and the AF brackets. Pressing the up arrow a second time returns the monitor to the default display but adds a real-time histogram that graphically shows the distribution of brightness in the frame.



Link: Megapixel