Canon EOS 90D Advanced User's Manual page 570

Custom Function Setting Items
C.Fn III: Operation/Others
C.Fn III-1: Warnings z in viewfi nder
When any of the following functions are set, the < z > icon can be displayed
in the viewfi nder and on the LCD panel ( = 34).
Select the function for which you want the warning icon to appear, then
press < 0 > to add a checkmark [ X ]. Select [OK] to register the setting.
When monochrome V set

If [ z : Picture Style] is set to [Monochrome] ( = 231), the warning
icon will appear.
When WB is corrected

If white balance correction is set ( = 227), the warning icon will appear.
When M is set

If [ z : High ISO speed NR] is set to [Multi Shot Noise Reduction]
( = 238), the warning icon will appear.
When HDR is set

If [ z : HDR mode] is set ( = 251), the warning icon will appear.
If you set any of the checkmarked [ X ] functions, < z > will also appear for the
o
respective setting displayed on the Creative Zone screen ( = 67).
C.Fn III-2: Dial direction during Tv/Av
Dial turning direction when setting the shutter speed and aperture can be
reversed.
In the < a > shooting mode, the turning direction of the < 6 > and < 5 >
dial will be reversed. In other shooting modes, the turning direction of only
the < 6 > dial will be reversed. The direction of the < 5 > dial in < a >
mode matches the direction to set exposure compensation in < d >, < s >,
and < f > modes.
0: Normal

1: Reverse direction

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