l_opacity</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>tooltip</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>auto_highlight</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>,
  <span class='kw'>highlight_colour</span> <span class='kw'>=</span> <span class='st'>"#AAFFFFFF"</span>,
  <span class='kw'>light_settings</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span>(),