Creating a three point arc_c or arc_d, and then enabling symmetry make the mirrored part use the opposite tool. IE, arc_c is mirrored to an arc_d in rotational symmetric mirroring mode. (mirror mode three?)
tested on linux, and web versions, both freshly downloaded as of today.
neauoire
commented
5 years ago 
Creating a three point arc_c or arc_d, and then enabling symmetry make the mirrored part use the opposite tool. IE, arc_c is mirrored to an arc_d in rotational symmetric mirroring mode. (mirror mode three?)
tested on linux, and web versions, both freshly downloaded as of today.