The selection model used to work the way you expected - clicking on a line segment would select the whole shape. I changed it to select only the two points tha

The selection model used to work the way you expected - clicking on a line segment would select the whole shape. I changed it to select only the two points that made up that line segment because I thought it made more sense, and there's usually plenty of hit-area on the inside of the shape for selecting the whole thing. In this case, I see how it was confusing. I suppose I could revert back to the old selection model, or add an edge case where clicking on a line segment selects the whole shape if it consists of only two points. The current system would make more sense if there were more things you could do with selected points besides just moving them around with the arrow keys. Either way, thanks for reporting this. If you catch any more problems, please log them in https://github.com/artursapek/mondrian/issues https://github.com/artursapek/mondrian/issues. :)