To zoom the camera in to an arbitrary region of the view, on the Structure view toolbar click thebutton, or right-click and choose from the context menu. Position the cursor at one corner of the region of interest and press the mouse button. A box displays and expands as you move the cursor. Position the cursor at the other corner of your region of interest. When you reach the extent of your region of interest, release the mouse button. The view is fit to your region of interest and Zoom Area mode is exited.