The procedure for creating a bookmap is similar with that for creating a map.
Go to menu
→ or click on the toolbar button.On the tab From templates of the New dialog select the DITA Map - Bookmap template and click OK. A new tab with the new bookmap is added in the DITA Maps Manager view.
Press the
button on the toolbar of the DITA Maps Manager view.In the Save As dialog select a location and a file name for the map.