The option 4 is if you use both, but at different times.I don't understand how option 2 is different from option 4.
Yup, that is the difference.The option 4 is if you use both, but at different times.
Sometimes with the remote, or not the remote but with the device instead.
At least that's how I read it to be?
I use the remote, always have.
I can't see why one would switch back and forth because the remote isn't all that cumbersome to carry, unless the battery is dead and you just have to get the shot of a lifetime with just the device.