  Graphene subject to a strong, tilted magnetic field exhibits an
insulator-metal transition tunable by tilt-angle, attributed to the transition
from a canted antiferromagnetic (CAF) to a ferromagnetic (FM) bulk state at
filling factor zero. We develop a theoretical description for the spin and
valley edge textures in the two phases, and the implied evolution in the nature
of edge modes through the transition. In particular, we show that the CAF has
gapless neutral modes in the bulk, but supports gapped charged edge modes. At
the transition to the FM state the charged edge modes become gapless and are
smoothly connected to the helical edge modes of the FM state. Possible
experimental consequences are discussed.
