Feature Request: Resize entire layer

[zydeas]

I got most of the way through making my entire drawing before I realized I was at the minimum zoom level (it shows 16.46). I'd like to be able to zoom farther out so I can see my entire drawing, but I can't because I'm already zoomed out too far. It'd be great if I could perform some type of transformation on the entire layer to scale it down to something more reasonable.