pan>,
  <span class='kw'>pal</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>pal_rev</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>,
  <span class='kw'>width</span> <span class='kw'>=</span> <span class='fl'>0.75</span>,
  <span class='kw'>alpha</span> <span class='kw'>=</span> <span class='fl'>1</span>,
  <span class='kw'>size_line</span> <span class='kw'>=</span> <span class='fl'>0.5</span>,
  <span class='kw'>title</span> <span class='kw'>=</span> <span c