Polygon Lasso Tool in annotation mode

Hello,

I love annotation mode with Navigraph Charts, specifically for drawing/planning taxi routes. A problem I typically encounter when tracing taxi routes is the freehand tool can get a little inaccurate at times. What I would love to see is a tool similar to the polygon lasso tool in Photoshop, where I can drag my mouse from point A to point B, then have a line drawn along that path. Hopefully that makes sense, but if not, I have included a small CodePen example of the functionality, which I think would benefit annotations: