Canon EOS M2 - Page 96

d: Program AE
96
 If the “30"” shutter speed and the lower f/number blink, it
indicates underexposure. Increase the ISO speed or use
flash.
 If the “4000” shutter speed and the higher f/number blink, it
indicates overexposure. Decrease the ISO speed.
Differences Between <d> and <A>
In the <A> mode, many functions such as the AF operation are set
automatically. The functions you can change are limited. Whereas with the <d>
mode, only the shutter speed and aperture are set automatically. You can freely
set the AF operation and other functions (p.308).