Hi Friends,

Many websites have something called as the ‘SiteMap’ which allows the user to see a navigational/hierarchical structure of the website making it easy for the user to locate the content he/she wants to see (like a typical map, for guidance purposes)

Similarly, if you create a report with too many items on it: a table, a chart, with totals, with groups, etc – you may want to give a site map to the user to that he can quickly jump to a particular item in the report. This is called as Document Map. It appears in a separate pane on the left side of the report viewer, and can be toggled (ON/OFF) from the report toolbar.

See the following section in books online: How to implement a Document Map.

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Hope it helps.