title: How to add arrow annotations?
body: <p>I need to add a batch of arrow annotations to an image, I know all the start and end points of the arrows.<br>
  And I've put them into an image (2 columns, many rows) which I used as a data sheet, how to realize it in script?  </p>
  
  <p>I noticed that in the <em>DM help manual</em> that the line annotation has the attributes-- start point and end point.<br>
  But the function to create an arrow annotation jsut looks like this:<br>
  <code>Component NewArrowAnnotation( Number top, Number left, Number bottom, Number right )</code>  </p>
  
  <p>Does that mean the number <code>top</code> and <code>left</code> define the start point, number <code>bottom</code> and <code>right</code> the end point?</p>
  
  <p>I also need to change the color of the annotations, and add some text next to them (either side is OK, but please show me how to control it).</p>