The small buttons on the right side of the view title bar control the area displayed in the view and various parameters such as position, orientation, field of view, etc.
To activate them, just click the icons with the left mouse button and drag the mouse, or click inside the view while holding down the appropriate shortcut keys and right mouse button.
Lets you pivot the camera around its point of interest.
Drag the mouse up to move the camera forward. Drag it down to move the camera backward. This action does not change the viewing angle: perspective distortions may result at the edges of the scene.
F.O.V. (Field Of View)
Drag the mouse up to zoom in. Drag it down to zoom out. This action changes the camera field of view and increases the size of the point of interest by increasing the lens length.
Dolly / F.O.V.
This function combines Dolly and F.O.V.
Drag the mouse horizontally to move the view from side to side. Drag it vertically to move the view up and down.
Click in any view to set a corner, then drag the mouse diagonally to define the area that will be magnified.
See also: