That you can use to easily create such diagrams? I mean not just distribute shapes, and link them so that when you move the line was attached to the figure. Like that seen in PowerPoin, but to use it for this PPV, plus there is not very convenient to change the size of the canvas.
Still was also found from minikov it is specially created for diagrams, but too heavy plus paid. What are the options to quickly and without pain was possible to make such scheme? Here is an example.
Photo on imgur: https://imgur.com/a/6qVcCfl