Canon EOS 7D Mark II (G) Instruction Manual page 441

Warnings z in viewfinder
When any of the following functions are set, the <z> icon can be
displayed in the viewfinder and on the LCD panel (p.26-27).
Select the function for which you want the warning icon to appear, and
press <0> to append a <X>. Then select [OK] to register the setting.
When monochrome V is set
If the Picture Style is set to [Monochrome] (p.162), the warning
icon will appear.
When WB is corrected
If white balance correction (p.172) is set, the warning icon will
appear.
When one-touch image quality is set
If you change the image-recording quality with the one-touch
image quality function (p.456), the warning icon will appear.
When M is set
If [z3: High ISO speed NR] is set to [Multi Shot Noise
Reduction] (p.176), the warning icon will appear.
When spot metering is set
If the metering mode is set to [Spot metering] (p.225), the
warning icon will appear.
When you set any of the checkmarked [X] functions, <z> will also appear
for the respective setting (except when Multi Shot Noise Reduction is set)
on the shooting settings screen (p.60, 469).
LV shooting area display
When the aspect ratio for Live View shooting (p.295) is set to [4:3],
[16:9], or [1:1], you can set the display method for the shooting area.
: Masked
: Outlined
3 Setting Custom FunctionsN
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