Snapping
From ALttP Speedrunning Wiki
Snapping refers to the automatic action of the game forcing Link into an exact position.
Door snapping
Snapping in doorways is useful tech for performing Door Glitches. It can be performed in 2 ways, both of which immediately stop Link's movement and allow the use of items.
- Taking damage while in a doorway (unless the knockback sends Link out of the door)
- Pressing parallel to the door while carrying an object
When snapping in north or west doors, the farthest snap will place Link 1 pixel away from the transition trigger. When snapping in east or south doors, the farthest snap is 3 or 4 pixels away from the trigger, respectively.
Auto doors can be snapped with the carry method, but it is generally more difficult.