title: Zoom region and display as a subplot within plot
body: <p>Is it possible to zoom into a region and display it as a subplot within the same plot? Here is my primitive attempt at freehand graphics, to illustrate my question:</p>
  
  <p><img src="https://i.stack.imgur.com/NHHxd.png" alt="enter image description here"> </p>
  
  <p>I can think of using <code>Plot</code>, and then <code>Epilog</code>, but then I get lost in the positioning and in giving the plot its own origin (When I try <code>Epilog</code> on <code>Plot</code>, the new plot lays on top of the old one, using the old one's origin). </p>
  
  <p>Also, it would be nice if the positioning of the subplot can be input, as different curves have different "empty regions" that can be used to position the image.</p>
  
  <p>I've seen this in several articles and I can do this in MATLAB, but I have no clue how to do it in mma.</p>