�|Description:�%
This markup is used in counting lines for line numbering in the margin of a
document. The level number is TEX's stacking level number. The default is
pop level 7.
�|Example:�%
If you must change to a different pop level, 9 for example, enter:
\poplevel{9}
�|Notes:�%
Line numbering is only available on the phototypesetter. This markup is
ignored for all other printers.
