[d--b]

I want to like this (I build www.jigdev.com which shares a lot with this) but for the love of god, how do I zoom in??!

[oniony]

Pinch zoom and two finger scrolling worked for me on Mac. Presumably mouse wheel on a mouse, perhaps combined with shift/ctrl/option/command for horizontal zooming. Holding space is often used for panning (thanks Photoshop), so give that a try too.