Gizmos
Gizmos are a common UI element which allows positioning within the 3D world.
A gizmo can contain the following elements:
Axis Arrows These coloured arrows correspond to the Cartesian coordinate system, otherwise known as XYZ coordinates. The red, green and blue arrows allow the gizmo to be dragged along the X, Y and Z axis respectively.
Center Node The center node can be clicked and dragged to move the gizmo on all 3 axis. While dragging, the gizmo will maintain the same distance to the camera.
Rotation Rings Some operations like placement or shape placement will add a rotation ring to the Gizmo, allowing you to perform rotations in addition to translations. The rotation ring can be grabbed and drag to rotate the object around that axis.
Global Gizmos A global gizmo has its rotation and axis arrows locked to the world xyz.
Local Gizmos Unlike global gizmos, local gizmos have their rotation and axis locked to the object itself. Rotating your object 45 degrees will alter your axis arrows by 45 degrees.