Canon EOS 5D Mark IV L-series Zoom Lens Kit Owner's Manual

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: Shooting Information Display
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AF Point Display
When [33: AF point disp.] is set to [Enable], the AF point that 
achieved focus will be displayed in red. If automatic AF point 
selection is set, multiple AF points may be displayed.
 
Histogram
The brightness histogram shows the exposure level distribution and 
overall brightness. The RGB histogram is for checking the color 
saturation and gradation. The display can be switched with [33: 
Histogram disp
].
[Brightness] Display
This histogram is a graph showing the distribution of 
the image’s brightness level. The horizontal axis 
indicates the brightness level (darker on the left and 
brighter on the right), while the vertical axis indicates 
how many pixels exist for each brightness level. The 
more pixels there are toward the left, the darker the 
image. The more pixels there are toward the right, 
the brighter the image. If there are too many pixels on 
the left, the shadow detail will be lost. If there are too 
many pixels on the right, the highlight detail will be 
lost. The gradation in-between will be reproduced. By 
checking the image and its brightness histogram, you 
can see the exposure level inclination and the overall gradation.
[RGB] Display
This histogram is a graph showing the distribution of each primary color’s 
brightness level in the image (RGB or red, green, and blue). The horizontal 
axis indicates the color’s brightness level (darker on the left and brighter 
on the right), while the vertical axis indicates how many pixels exist for 
each color brightness level. The more pixels there are toward the left, the 
darker and less prominent the color. The more pixels there are toward the 
right, the brighter and denser the color. If there are too many pixels on the 
left, the respective color information will be lacking. If there are too many 
pixels on the right, the color will be too saturated with no gradation. By 
checking the image’s RGB histogram, you can see the color’s saturation 
and gradation condition, as well as white balance inclination.
Sample Histograms
Dark image
Normal brightness
Bright image