title: Gnuplot - rectangles as objects outside graph area?
body: <p>I would like get something like this:</p>
  <p>Rectangle outside graph:</p>
  <p><a href="https://i.stack.imgur.com/BYQa7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BYQa7.png" alt="enter image description here" /></a></p>
  <p>Could I get that with <code>set object &lt;number&gt; rect</code> ? Or is this only to draw rectangles inside graph?</p>