Gizmo helps you move, rotate or scale objects in Owlet. Although you can do this using node properties panel, it is much easier to use the gizmo instead. Here is the gizmo:
These arrows (or other shapes in other modes) can be used for dragging, rotating and scaling objects in Owlet. Note that you can transform only nodes, not meshes that way. In order to transform the mesh, you need to extract it first using the scene tree context menu.
You can switch gizmo modes using Scene menu by clicking Select, Move, Rotate, Scale or Set camera target items, or by clicking the buttons at the left of the toolbar:
From left to right:
You can also switch gizmo modes by pressing 1, 2, 3, 4 or 5 keys on your keyboard.