title: Resize by default TinyMCE
body: <p>I'm using TinyMCE for the first time, and I love it, but is a bit closed.
  I'd like to get images resized by default, this is, when adding an image, put it by default on 300px width, for example (then the user can make it bigger or smaller dragging).</p>
  
  <p>I don't know where to touch! Is there a command within the lists of images (the js you can attach to make TinyMCE show a list of images)? Or I have to hack css? Or I have to dive into TinyMCE code?</p>
  
  <p>Thank you in advance
  Marc</p>