I don't like any of the choices. The Haptic button feels inferior to the good ole mechanical home buttons on the 6S & earlier.
Grudgingly I set my 8's home button to 3 but it still doesn't feel right
It's really easy to find, just follow that path. Or she can search "Home Button" in the Settings search bar. It'll only be there if she has an iPhone 7, 7 Plus, 8, 8 Plus, or SE.
Beats? How about when the mechanical button has a much higher failure rate v.s. the haptic home button with spring tension failures, not to mention, it was severely decreased the water resistance with mechanical home button.