Gizmo

The Gizmo is a transparent cube that appears in Scene view to help identify the location and scale of the Terrain. Enable the checkbox to display the Gizmo, and disable the checkbox to remove it. Click the arrow beside the checkbox to display color selection fields for the Gizmo's cube and wire frame. You can use the Move, Scale, and Transform tools on the Gizmo in Scene view.

Gizmo in Scene view