Currently, I have this:

![Current diagram][1]


However, I need space!:!![enter image description here][2]

As you can see above, I need space to write text on the right, while keeping the background gradient. 
I had a look here: https://blender.stackexchange.com/questions/2376/how-can-i-resize-move-the-canvas-of-an-image-in-the-compositor
But it doesn't seem to work.

This is an example of my current compositing:
![https://i.sstatic.net/lWjrQ.png][3]
.blend file: http://www.filedropper.com/xtruder22_1

Many Thanks


  [1]: https://i.sstatic.net/0BUT7.png
  [2]: https://i.sstatic.net/JSFmg.png
  [3]: https://i.sstatic.net/lWjrQ.png