You can try that, dou-click the image in project, and open the imageeditor,press alt + mouse left on the view right bottom, what I do is drag the windows view more bigger , than when I click the zoom in button, I can't find the scroll bar in view, so just a part of it can be saw
nomal:
<img src="https://dl.dropbox.com/u/45395066/QQ%E6%88%AA%E5%9B%BE20120704152456.png" border="0" />
zoom in :
<img src="https://dl.dropbox.com/u/45395066/QQ%E6%88%AA%E5%9B%BE20120704152508.png" border="0" />