Possible Duplicate:
In Photoshop, how can I open up a view (in the same window) with another zoom level?
I'm working on small 16x16px icons. I'm usually zoomed right in working pixel by pixel. It would be hugely useful to have a 'live preview' at 100% scale, so I don't have to manually zoom in and out all the time to see how it looks. Is this possible?