When zoomed in on a graphical window, such as the Device window, you can open the World view to navigate around the overall design area. The World view displays a less detailed overview of the active graphical window to enable a quick pan of the viewed area.
This feature is available in the Device window, Schematic window, Package window, and Hierarchy window when you are zoomed into a small region of the device or design. To display the World view, click the Show World View button in the lower right corner of a graphical window, as shown in the following figure.
The World view reflects the zoom area and the selected objects for the active window. In the following figure, the World view shows the overall Device window that is currently zoomed into the area identified by the navigation rectangle in the World view. You can select and drag the navigation rectangle to reposition the displayed area in the graphical window.
The World view opens to a default size. To resize the World view, click and drag any of the drag handles on the edge of the World view.
To reposition the World view, click anywhere on the perimeter of the view, except on the drag handles, and drag the view to a new position. Use this feature to reposition the World view anywhere within the limits of the graphical workspace window.
To close the World view, click the
downward pointing arrow icon in the view 
.