How do you label a scene that takes place both inside and outside?

If a scene transitions from INT. to EXT. or visa-versa, you should have a new scene heading:

EXT. BACKYARD – NIGHT

Masks pulled down, they insert the pick into the lock. They turn the torque wrench and enter...

INT. LAUNDRY ROOM – CONTINUOUS

If a scene breaks between INT. and EXT., you should include both in the scene heading:

INT./EXT. DANI’S BEDROOM – NIGHT

Steven pelts another rock at her window. She relents, and opens it.

DANI

My dad will hear you!

Scenes that take place in cars are often in this territory, unless we are strictly inside or outside the car.