Editing Prefabs in Context (Overview) – Unity 2020.1
When we introduced Prefab Mode in Unity 2018.3, it became easy to edit a Prefab Asset in isolation. In 2020.1 we’re introducing Prefab Mode in Context. Now, when opening a Prefab Asset via an instance in the scene, by default it’s opened in context.
Check out the documentation:
https://on.unity.com/2z2MDe1