This is perfect, I made a 'shape' a 70 degree line; now anytime I want to quickly draw a 70 degree line on a picture I just have to hold the shift key and I can make it any length.
There is something odd going on though, when I try to draw more complex shapes they don't line up; there is a whole section of the drawing area that I can't draw on. I see some talk about dpi, I'm not sure if this is adjusted in the operating system, paint.net or the plugin.
Any thoughts would be appreciated.