Command lines to be typed are shown in typewriter font in a box. For example:
When describing the general form of a command, rather than a particular example, square brackets
 are used to enclose optional parts, and angled braces <> to enclose general descriptions which
may be substituted for particular instances. For example,
describes a command line which requires an operation and, optionally, a range. An exception is that
we use in.pdf and out.pdf instead of <input file> and <output file> to reduce verbosity.
Under Microsoft Windows, type cpdf.exe instead of cpdf.
cpdf <operation> in.pdf [<range>] -o out.pdf