title: Prevent image stretch in fullscreen for psychopy
body: <p>This is the first time I am using this software to create an experiment.</p>
  
  <p>For my experiment I am presenting two images side by side, ideally I would like to run this experiment in fullscreen but when I set the value to true, the images become stretched. How do i fix their aspect ratio so I can run the program in full screen without stretching the images?</p>
  
  <p>I am using a MacBook Pro and the PsychoPy coder.</p>
  
  <p>Here is my current code for the images:</p>
  
  <pre><code>scale=0.7
  faceRGB = visual.ImageStim(win,image='male.jpg', 
  mask=None,
  pos=(0.0,0.0),
  size=(scale,scale))
  
  
  faceRGBINV = visual.ImageStim(win,image='maleInv.jpg', 
  mask=None,
  pos=(0.0,0.0),
  size=(scale,scale)`
  </code></pre>
  
  <p>Furthermore, in my experiment one of the images will be slightly compressed or stretched as it is. The participants will then have to choose the fatter face. This is already set up and when run in a window the images appear normal, it is just in fullscreen mode when they become stretched to fit the monitor size.</p>