Canon EOS R50 Instruction Manual page 177

4.
Take the picture.
Caution
If the "30"" shutter speed and the lowest aperture value blink, it indicates
underexposure.
Increase the ISO speed or use flash.
If the "1/4000" shutter speed and the highest aperture value blink, it indicates
overexposure.
Lower the ISO speed or use an ND filter (sold separately) to reduce the amount of
light entering the lens.
Note
Differences between <P> and <
< > mode limits available functions and sets the AF area, metering mode, and
many other functions automatically to prevent bad shots. In contrast, <P> mode
only sets the shutter speed and aperture value automatically, and you can freely
set the AF area, metering mode, and other functions.
Program shift
In <P> mode, you can freely change the combination (program) of shutter speed
and aperture value set automatically by the camera while maintaining the same
exposure. This is called Program shift.
With Program shift, you can press the shutter button halfway, then turn the <
dial until the desired shutter speed or aperture value is displayed.
Program shift will be canceled automatically when the metering timer ends
(exposure setting display turns off).
Program shift cannot be used with flash.
Compose the shot and press the shutter button completely.
> modes
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