With the Bezier tool you can create multiple node paths from one path to another. You can only draw straight paths, but you can further manipulate the drawn paths with the Select tool. The edges of bezier lines will snap to any other path of the knife.

With the bezier tool you can also draw the outline of the profile of the knife to create a new project.bezier.tool

Creating a Path

To start drawing a path, left click anywhere on your project to create the first node, then click somewhere else(empty space or another path) to create a path from the first node to that point..
bezier first move
To complete the path double left click anywhere.

To cancel the path that you are drawing right click anywhere on the screen.