title: Canvas too big for the camera in Unity
body: <p>I have created a 2D game with an orthogonal camera and using 16:9 display size.</p>
  
  <p>I dragged my background image onto the hierarchy (it's about 2048x1152) and then set the camera size to be 22.5, which made it fit the background perfectly and displays just right.</p>
  
  <p>However, when I add a Canvas for a UI it is absolutely giant, about 100 times bigger. It only becomes 'normal' size with respect everything else added when I set the camera to its default size of 5. So when I add a small graphic, it too becomes giant.</p>
  
  <p>I'm simply following a book I read and I'm not doing anything to deviate.</p>
  
  <p>Am I doing something wrong? Below is what I mean. The background image is the little image in the bottom right and the outlined rectangle is the canvas with a small graphic added.</p>
  
  <p>Thanks.</p>
  
  <p><a href="https://i.stack.imgur.com/g8tzJ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/g8tzJ.png" alt="Image"></a></p>