title: Zoom in and Out through a NSView or Magnify
body: <p>I am hoping to be able to make something similar to the universal access zoom window shown below.  I have already created an NSView and using a fill operation I made a rect with a clear "see through" composite to see through my window and show the desktop.  Now I am wondering if it is possible to zoom in and out inside my view just like the picture below.  I was thinking this might be an IkImageView or something I could apply but i wasent sure how it was done.  Does anyone know how to do this or show me where I could find this in the docs? Some code would be great. Thanks!</p>
  
  <p><img src="https://i.stack.imgur.com/ccD4z.png" alt="enter image description here"></p>