While we have a lot of work in the hopper to help with positioning, we did make one invisible but handy change now. If you upload an artboard or SVG canvas that is the magic dimensions 12x20, the UI will override its automatic placement of the contents and pin the top-left corner of the artboard to the top-left corner of the screen. This little workaround makes it easier to use jigs, if you so desire. I haven’t tried it myself, but something tells me @takitus will give it a whirl soon.
Don’t count on this feature sticking around permanently, but it was a quick and easy workaround for the time being.