I don't know what I did, normally the Space Plane Hangar (SPH) uses mirror symmetry - meaning if you place two horizontal stabilizers they will both be on the top of the vessel. And the Vehicle Assembly Building (VAB) uses radial symmetry - meaning the horizontal stabilizers will be on opposite sites of the vessel.
I've done something and now some parts in the SPH are using radial symmetry.
How do you switch symmetry modes? I know "X" will change the number of symmetry points you have, but what changes symmetry mode?