title: Add more space to existing canvas without redrawing?
body: <p>I've created a canvas that I've drawn images and texts on. Is it possible to add more space (height in my case) to the current canvas without having to redraw everything? I would like to add text below the already drawn items but to do this I have to add more height to canvas.</p>
  
  <p>Or can I do it the other way around - create a too large canvas to start with and then add all my texts and in the end crop the canvas (removing white unused space)?</p>