Canon EOS 90D For Dummies. Robert Correll

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        The white box or corner markings represent the autofocusing frame. The appearance of the frame depends on the AF Method, which Chapter 5 explains.

       Check the areas labeled in Figure 1-19 to view the battery status. The symbol shown in the figure represents a full battery.

       The number of shots remaining or the available movie recording time appears next to the battery symbol. Again, Figure 1-19 shows you where to look.

       You can’t display the Electronic Level when the camera is set to the default AF Method setting (Face + Tracking). To display the level, you must switch to Spot AF, 1-Point AF, or Zone AF. (You can do so via the Quick Control screen, as outlined a little later in this chapter.)

       The chart that appears in the histogram display (bottom-right screen in Figure 1-20) is a tool you can use to gauge exposure. See the discussion on interpreting a Brightness histogram in Chapter 9 to find out how to make sense of what you see. But note that when you use flash, the histogram is dimmed. The histogram can’t display accurate information because the final exposure will include light from the flash and not just the ambient lighting. In addition, the histogram dims when you use B (Bulb) exposure mode, which keeps the shutter open for as long as you hold down the shutter button. The camera can’t predict how long you’re going to hold that button down, so it can’t create a histogram that will reflect your final exposure.

       Also note the Exposure Simulation symbol that appears in the bottom two screens shown in Figure 1-20. (Look in the lower-right corner of the frame next to the magnifying glass.) This symbol indicates whether the monitor is simulating the actual exposure that you’ll record. If the symbol blinks or is dimmed, the camera can’t provide an accurate exposure preview, which can occur if the ambient light is either very bright or very dim. Exposure Simulation is also disabled when you use flash.