Legend check box will show you a legend associated with the map. When you check this box, a separate legend window will appear on the up left corner of the screen. You can move the legend window to a different place if you want. By default, you will be able to pan the legend to find the legend information you need. Interactive Maps are client side Internet geographic information applications.
Users interact with the downloaded components on their own computers.
In general, the client side Internet applications will be running faster than server side applications after the user downloads the files. The server side Internet applications, on the other hand, run on the server. Users interact with applications by sending requests to the server and get responses from the server. Server side Internet applications are usually running slower than client side ones. They are the components supporting Internet Explorer to run the Interactive Maps applications.