This object sets the maximum number of lines per page for a text
file that is being printed using this interpreter.
For PCL Interpreters, this object provides the General PJL
Environment Variable FORMLINES. This variable is tied to both
the PJL Environment Variables PAPER and ORIENTATION. If the
value of either of those variables is changed, then the
FORMLINES variable automatically is updated to maintain the
same line spacing.
The value zero means not specified.