The Scene Gizmo has a conical arm on each side of the cube. The arms at the forefront are labelled X, Y and Z. Click on any of the conical axis arms to snap the Scene View Camera to the axis it represents (for example: top view, left view and front view). You can also right-click the cube to bring up a menu with a list of viewing angles. To return to the default viewing angle, right-click the Scene Gizmo and and click Free