title: "[img]" tag formatting for x% simple visualization code and full link to directly load in 1:1 scale
body: <p>I just want to know a simple complement to the code <code>[img]</code> to get it to be shown at a X% of its original size.
  I was thinking about <code>[img width="50%" height="50%"]</code> but that doesn't make any sense. Instead of a huge code, what could I place in the brackets to show the image at a X% scale?
  Is that a PHP code?</p>
  
  <p>And the other question. I've seen a little "tag" you could place in the direct link that could load an image into its full resolution or a lower size. I tried to find on the web, but I don't know how to describe being specific in my search criteria. For example, I pasted something like <code>http://example.com/image.jpg=fullscreen</code> and the image would load on the entire screen instead of clicking over it to zoom in. Or could it be <code>http://example.com/image.jpg=half</code> to show in half resolution.</p>