How to resize iOS emulator display size

These days, iOS display size becomes larger and lager.
Actually, even if we use 3.5 inch Retina, we can’t see all.

How to resize

I suggest easy short cut for it.
Command is mac button

Command + 1 100%
Command + 2 75%
Command + 3 50%

But, unfortunately, except for 100%, you cannot see bottom button of i device Frown