Since only part of a large buffer fits in the window, Emacs has to
show only a part of it. This chapter describes commands and variables
that let you specify which part of the text you want to see, and how
the text is displayed.
Scrolling: Commands to move text up and down in a window.
Recentering: A scroll command that centers the current line.
Auto Scrolling: Redisplay scrolls text automatically when needed.