title: Solid background for the entire subplot using multiplot in Gnuplot
body: <p>I am trying to plot two overlaping figures (one "big" and another smaller "zoomed-in"). The thing is I can't have a solid background on the entire "small" figure, meaning including labels, ticks labels, etc.</p>
  
  <p>Does anyone have an idea ?</p>
  
  <p>Here is a SWE of my problem (<strong>EDITED being closer to my problem</strong>):</p>
  
  <pre><code>reset
  set multiplot
  plot sin(x)/x ls -1
  set size 0.4,0.4
  set origin 0.6,0.5
  set object 1 rectangle from graph 0,0 to graph 1,1 behind fc rgb "#04AA40"
  plot sin(x)/x ls -1
  unset multiplot 
  </code></pre>