I don’t entirely understand the question, but hopefully additional information will help.
Movement around the explored map is possible using:
- Move action; moving between explored tiles
- Escaping from combat; retreat to an adjacent explored tile
- Items that may effect some sort of translocation or teleport to an explored tile
The only way of entering an unexplored tile is using the Explore action.
Backtrack is not a movement. It is a consequence of movement. Thematically it represents the hero’s party bringing attention to themselves and risking a denizen picking up their trail.
Any time you move from an explored location to another explored location, you leave behind a backtrack token.
Backtrack events occur when you enter a tile with a backtrack token. Or in rarer circumstances you are just told to make a Backtrack roll when the scenario would be the “same as” dropping a backtrack token and encountering it immediately.
Mechanically, it simplifies movement and prevents the player from subverting the intent of a fighting retreat. It also provides a nice mechanism for a “wandering monsters” roll.
Some historical context… for the sake of interest only.
Scout and move used to be a combined action. You had a kind of currency for how many “door actions” you could make during the action; either to scout and reveal a doorway or move to an adjacent explored tile. It was unnecessarily fiddly and worst of all encouraged players to reveal the map tiles one at a time. It’s far more fun to reveal as many tiles as possible and then arrange them.
I split scout and move into two separate actions.
Rather than force a Time Passes event on the Move action, I opted for a delayed Time Passes event in the form of the Backtrack token. This allows the player to reposition themselves on the map without penalty, but prevents them from gaming certain situations by moving around the map willy-nilly.
When you retreat from combat you place a Backtrack token. This makes it more difficult to retreat from a fight, and then move back into the tile that originated the combat. Its also a nice touch that if you do retreat from a battle, and sneak back to where the fight started that it takes time and you run the risk of encountering more monsters – but its still possible, and a totally valid tactic.