ol_box_select</span>(
  <span class='no'>fig</span>,
  <span class='kw'>callback</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>ref_layer</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>line_color</span> <span class='kw'>=</span> <span class='st'>"black"</span>,
  <span class='kw'>line_alpha</span> <span class='kw'>=</span> <span class='fl'>1</span>,
  <span class='kw'>fill_color</span> <span class='kw'>=</span> <span class='st'>"lightgrey