How to Change Magic Wand Setting?

When creating curved Walls and polygon-type elements based on Arcs, Circles and Splines, the approximation is based on the state of the Magic Wand Settings dialog box. With the two radio buttons on the right, you can choose between two tracing methods. Use the Design > Magic Wand Settings command to open this dialog box.

You can find more information at: https://helpcenter.graphisoft.com/user-guide/88468/