What maneuver is required to intentionally leave a stable low Earth orbit for reentry?

Answer

De-orbit burn

The de-orbit burn is performed by firing the main engines or thrusters in the direction opposite to the vehicle's travel to reduce orbital velocity sufficiently for gravity to pull it onto an atmospheric trajectory.

What maneuver is required to intentionally leave a stable low Earth orbit for reentry?

#Videos

How Do Rockets Land Back On Earth? - Physics Frontier - YouTube

rocketsspacecraftreentryLandingaerodynamics