Tap both waysT-money transfers depend on tapping when boarding and exiting.
Exit numbers matterThe wrong exit can add a long street-level detour.
Use local routingNaver Map or KakaoMap is the practical walking fallback.
Build the route before the platform
Search the destination in a local map app, note the line color, direction terminal and transfer station, then screenshot the route. At large stations, follow numbered exit signs before returning to street level.

Related Koursea places and tools
Official source: Seoul Metro (English).
Photo: Wikimedia Commons