PFH1987

Hello, I have been using Paint.net for years and love it. I am an electrical engineer and I have recently started using it to do my layouts for the Human Machine Interface (HMI). In order to do this I need to be able to control the sizes of shapes eg. rectangles, circles to specific dimensions. Is there a method or a plugin that allows this? Other then looking at the dimension in the corner and draging until it is correct.