The Scene View, or Scene Window, is where we will spend the majority of our time in Unity. It allows us to see our scene, and edit and select objects.
The scene View is most closely linked to the Hierarchy – they are both ways to edit a scene, and the Game View.
There are a few features in the scene view that can really mess you up if you are not aware of them.
The 2D mode toggle will switch your scene view to 2D mode, the camera will become orthographic and you won’t be able to rotate the camera.
This button below the gizmo in the top-right of the scene view will switch the camera between “ISO”, or orthographic, and “Persp” or perspective projections. If you are in “ISO” (which is short for Isometric), it’s the same as if the camera were a perspective projection. You can still rotate the scene, but further things won’t appear smaller.
To the top right of the gizmo is a small lock icon that can be easy to accidentlly press, and hard to notice if it has been pressed.
The gizmo that lets you rotate the scene will be grayed out.