To open the DX Cluster Bandmaps, on the Logbook click on 1. View 2. DX Cluster 3. Bandmap #. As you can see from the Bandmap menu, you can open up to 10 bandmaps at any one time. They are all displayed on the right side of your Logbook as shown below. If more than one bandmap is opened, there are "TABS" across the bottom of the bandmap display indicating each bandmap open.