Vertical scroll
From SnesLab
Vertical Scroll Settings
When you set that setting to "No Vertical Scroll," it makes it so no matter what the screen won't scroll up or down.
When you set that setting to "Vertical Scroll At Will," the screen will follow you up and down.
When you set that setting to "No Vertical Scroll unless Flying/Climbing/etc.," the screen will only follow you if flying, climbing and so on.
When you set that setting to "No Vertical Scroll or Horizontal Scroll," that means the screen won't move so like only a box.