[Inkscape-user] Rotate Viewport/Canvas

I've not long owned a graphics tablet and last night I had a lot fun inking some pencils with the calligraphy tool. But one of the issues I have with tablets is that you can't rotate them to draw lines on those funny angles - well, you can but it makes drawing more difficult.

I've never seen any application do this, but it would be really neat if you could rotate the viewport/canvas just like you rotate a piece of paper. It is, of course, only going to be useful for tablet users. And I could rotate all of a drawing, and then rotate it backagain, but that would be tedious.