To change or "modify" a Lightning Lane selection in 2026, you must use the My Disney Experience app (for Florida) or the Disneyland app (for California). Navigate to the "My Day" or "Tip Board" section where your current plans are listed. Tap on the specific attraction reservation you wish to change, and you should see a "Modify" button. This allows you to search for different time slots for the same ride or swap the attraction entirely for another available one without having to cancel your original booking first. This is a critical strategy for "booking up," as it allows you to hold a spot while looking for something better. However, you can only modify a selection before its arrival window begins and as long as there is remaining inventory for the new choice. Once you have tapped into the physical touchpoint at the ride entrance, the selection is considered "used" and can no longer be modified. If you are trying to change a "Single Pass" (Individual Lightning Lane), be aware that these are generally non-refundable and harder to move.