Documentation conventions

The following table describes typographical conventions used throughout this document:

Convention	Explanation
boldface	Indicates a command or keyword that you should type exactly as shown.
italics	Indicates a variable for which you should substitute an appropriate value.
`monotype`	Indicates literal input and output.
Ctrl + D	Indicates two or more keys pressed simultaneously.
[ ]	Brackets surround and optional value.
\|	Vertical bars separate alternative values from which you must make a selection.
...	Ellipsis indicates that the preceding element can be repeated.