At any time, you can change the Scene view in a number of ways, depending on whether you have a 3-button, 2-button, track pad, or a Mac with only one button. Read up on it in the Unity manual (http://docs.unity3d.com/Manual/SceneViewNavigation.html) to find what works for you.
In general, combinations of left/right mouse clicks with the Shift/Ctrl/Alt keys will let you:
- Drag the camera around
- Orbit the camera around the current pivot point
- Zoom in and out
- Alt + right-click the mouse to swing the current eye orbit up, down, left, or right
- When the hand tool is selected (upper-left icon bar), the right mouse button moves the eye (the mouse middle-click does a similar move)
In the upper-right of the Scene panel, you ...