I used to think that when the dog finished FF and began any lining exercises (pile work, T or TT...) that was when transition started. IOW a dog transitions from doing marks to doing marks and blinds.
But reading the term in context in some literature, I think that's mistaken. It seems that transition is after the dog has pretty much completed TT and yard work and is putting those basics into field work.
Can you please define the term for me?