There is no need to type the line numbers, since Viper inserts them automatically in front of the Ex command. See section Basics , for more info. Emacs divides the screen into tiled windows . You can see the contents of a buffer through the window associated with the buffer. The cursor of the screen is positioned on the character after point .
Every window has a mode line that displays information about the buffer.
If you write out the contents of a buffer to a file, then the buffer will become not modified. A special buffer called Minibuffer is displayed as the last line in a Minibuffer window. The Minibuffer window is used for command input output. An Emacs buffer can have a major mode that customizes Emacs for editing text of a particular sort by changing the functionality of the keys. Keys are defined using a keymap that records the bindings between keystrokes and functions.