• From the OpManager dashboard, select Maps --> Network Maps link (mouse-over the Maps tab to see the links to all the maps).
• In the Networks Map, select Actions --> Settings menu to your right.
• You will find a combo-box to select the seed device. Select the core switch from the list.
• Select the topology layout from the layout combo-box.
• Specify the interval (in days) at which the map must be re-drawn in the Sampling Interval field and click Submit.

My problem is I cannot find Network Maps. The attachment is a screenshot.