title: How to select specific image from source file when multiple images are in the source file?
body: <p>I've noticed that google's image source files for their pages may contain lots of images in one source, but then only one will be displayed in a specific position.</p>
  
  <p>for example, this: "<a href="https://www.google.co.uk/images/nav_logo242.png" rel="nofollow">https://www.google.co.uk/images/nav_logo242.png</a>" 
  is one image source file for google's results page but then they will somehow choose a specific part of this source to display in a part of their webpage.</p>
  
  <p>I would like to replicate this somehow but don't know how this is accomplished? </p>
  
  <p>I only know how to use an image source when you use one image at a time and display all of it.</p>
  
  <p>Thanks in advance to anyone who can help me!</p>