Canon EOS R Advanced User's Manual page 141

Combinations of Functions in [ t ] Mode
Shutter
Aperture
Speed
[AUTO] [AUTO]
Manual
[AUTO]
selection
Manual
[AUTO]
selection
Manual Manual
selection selection
Blinking values indicate that the values set will cause underexposure or
o
overexposure. Adjust the exposure until the value stops blinking.
Slow synchro is not used under low light when you have set up [ t ]
o
mode to resemble [ f ] or [ d ] mode, even when [Slow synchro] in
[ z 2: External Speedlite control] is set to [1/200-30sec. auto].
Values for shutter speed, aperture, and ISO speed that are set to [AUTO]
o
are underlined.
You can set shutter speed, aperture, and ISO speed to [AUTO] and
o
exposure compensation to [±0] in steps 2 or 3 by pressing the < X > or
< Z > key.
ISO Speed
Compensation
[AUTO]
Manual
selection
[AUTO]
Manual
selection
[AUTO]
Manual
selection
[AUTO]
Manual
selection
Flexible-Priority AE
Exposure
Available Similar to [ d ]
Available Similar to [ s ]
Similar to [ f ]
Available
Available
Similar to [ a ]
–
Shooting
Mode
141