Solution
"Panning mode" automatically sets an optimum shutter speed for panning photography.
Additionally, image blur will be reduced for Live View shooting when using the compatible lens listed below.
EF 85mm f/1.4L IS USM
EF 24-105mm f/4L IS II USM
EF 70-200mm f/4L IS II USM
EF-S 18-135mm f/3.5-5.6 IS USM
NOTE
Including overseas models.