Author (and Blabr dev) here. I have no answer--other than it seems like a really good idea, now that you've said it. The plotting widget I used is based on flo

Author (and Blabr dev) here. I have no answer--other than it seems like a really good idea, now that you've said it. The plotting widget I used is based on flot [0]. It looks like flot can draw simple shapes ([1], see "markings"). I'll look into improving the widget--thanks for the idea. [0] http://www.flotcharts.org/ http://www.flotcharts.org/ [1] https://github.com/flot/flot/blob/master/API.md https://github.com/flot/flot/blob/master/API.md