The following is the procedure to zoom in/out the Overview screen is as follows:
On the global navigation tab, click Map View.
Physical configuration information of the system is displayed on the Main pane.
On the Main pane, use the mouse wheel or click the zoom in/out button of the menu bar.
If zoom in, move the mouse wheel upwards to scroll.
If zoom out, move the mouse wheel downwards to scroll.
If zoom in, click "+" (zoom in button).
If zoom out, click "-" (zoom out button).
If adjust the scale to 100 %, click 100%.