Adding a dialogue box for line properties similar to circle. Lately my work has been more engineering than art, and have been frustrated placing lines in exact locations. A snap grid would help, but I find these frustrating as well. Prefer to type in coordinates, similar to cad programs. Could also be useful for curves, and for editing shapes. I realize your intent is to keep the vector functions simple, but once you start using vcw editing tools, there is no option to save to dxf (or whatever) and use another tool. I find your limited editing tools superior to cad tools, and use them often. I suppose I create my own problems, by coming to a roadblock with your tools, and need to start from scratch agin in another cad tool.
Have you thought about adding a toolbar across the top, to replace some of the functions on Draw bar on the left. For instance, if all the file and view operations were moved to a toolbar (fundamentally a diferent than drawing) , perhaps there would be enough room to display properties in a section of lthe draw bar, without covering the entire box. I guess the problem I encounter is continually changing windows.
Just some thoughts