Just installed unbuntu on virtualbox on my Macbook Pro 9,1 looks great and appears to be working great. One major issue is the usable desktop space. I realise it is through virtualbox but I am losing about a 3rd of my usable desktop. Is there some way I can increase the usable area? I have a 13" screen on my Macbook so it was small enough in the original format.

Want to use unbuntu but at the moment is doesn't appear to be a good option, please advise.