Permanent auxiliary lines (dashed red) are individually configured by the user and provide the possibility to tear up a construction and pulling out the result. This method corresponds to a pen, which predefines a geometric structure or a construction. The required lines and polygons are generated using familiar drawing functions and can be manipulated later on suing handles and gripper.
The temporary auxiliary lines (dotted black) are lines, which are suggested by the system (parallel, perpendicular, extension, certain angles, etc.), in relation to certain points (orange cross), so new points can be found without additional mouse clicks.