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# Miscellaneous Commands

GNU Info contains several commands which self-document GNU Info:

`M-x describe-command`
  Reads the name of an Info command in the echo area and then displays a brief description of what that command does.
`M-x describe-key`
  Reads a key sequence in the echo area, and then displays the name and documentation of the Info command that the key sequence invokes.
`M-x describe-variable`
  Reads the name of a variable in the echo area and then displays a brief description of what the variable affects.
`M-x where-is`
  Reads the name of an Info command in the echo area, and then displays a key sequence which can be typed in order to invoke that command.
`C-h` (`get-help-window`)
`?`
  Creates (or moves into) the window displaying `*Help*`, and places a node containing a quick reference card into it. This window displays the most concise information about GNU Info available.
`h` (`get-info-help-node`)
  Tries hard to visit the node `(info)Help`. The info file ``info.texi'` distributed with GNU Info contains this node. Of course, the file must first be processed with `makeinfo`, and then placed into the location of your info directory.

Here are the commands for creating a numeric argument:

`C-u` (`universal-argument`)
  Starts (or multiplies by 4) the current numeric argument. ``C-u'` is a good way to give a small numeric argument to cursor movement or scrolling commands; ``C-u C-v'` scrolls the screen 4 lines, while ``C-u C-u C-n'` moves the cursor down 16 lines.
`M-1` (`add-digit-to-numeric-arg`)
`M-2` ... `M-9`
  Adds the digit value of the invoking key to the current numeric argument. Once Info is reading a numeric argument, you may just type the digits of the argument, without the Meta prefix. For example, you might give ``C-l'` a numeric argument of 32 by typing:

      C-u 3 2 C-l

  or

      M-3 2 C-l

``C-g'` is used to abort the reading of a multi-character key sequence, to cancel lengthy operations (such as multi-file searches) and to cancel reading input in the echo area.

`C-g` (`abort-key`)
  Cancels current operation.

The ``q'` command of Info simply quits running Info.

`q` (`quit`)
  Exits GNU Info.

If the operating system tells GNU Info that the screen is 60 lines tall, and it is actually only 40 lines tall, here is a way to tell Info that the operating system is correct.

`M-x set-screen-height`
  Reads a height value in the echo area and sets the height of the displayed screen to that value.

Finally, Info provides a convenient way to display footnotes which might be associated with the current node that you are viewing:

`ESC C-f` (`show-footnotes`)
  Shows the footnotes (if any) associated with the current node in another window. You can have Info automatically display the footnotes associated with a node when the node is selected by setting the variable `automatic-footnotes`. See section Manipulating Variables.

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