Symmetrize not duplicating properly When I try to symmetrize one bone structure for a model I'm working on it instead rotates it 90 degrees and keeps it on the same side of the model. I have the bones renamed to the .L But I bet there is some simple error I have causing issues for it.
By default Blender will symmetrize on the armature's X axis, your armature is currently oriented along the Y axis, so you can either rotate it in Edit mode on the Z axis so that it's correctly oriented along the X axis, or, once you've symmetrized, choose another axis on the Operator box.