�|Description:�%
When \printingnumbers{yes} and \countinglines{yes} have both been specified,
this markup is used to specify when a line number is to be printed for line
numbering in the margin of a document. It need only be specified once at
the top of a document. The default is every fifth line counted will be
numbered.
�|Example:�%
If you wanted every tenth line counted to be numbered, you would specify:
\lineinterval{10}
�|Notes:�%
Line numbering is only available on the phototypesetter. This markup is
ignored for all other printers.
You may specify an interval from 0-255. Practically speaking, you
should specify an interval from 1-150.
