This is a digital product. 

The file will show three ways to hold a knife.

There are two extremes and a middle ground. 

There is no "right way" to hold kitchen knives. Grips can easily shift based on what you're cutting, how ripe it is and what kind of knife and cutting board you're working with. 

Further, different people have different sized hands and stand at different distances to the cutting board (which does not often move up and down). 

Mastering the three main grips can assist