Create a dual axis map in Tableau From the Data pane, drag Longitude (generated) to the Columns shelf and place it to the right of the first Longitude field. The view updates with two identical maps. There are now three tabs on the Marks card: one for each map view, and one for both views (All). You can use these to control the visual detail of the map views. The top Longitude tab corresponds to the map on the left of the view, and the bottom Longitude tab corresponds to the map on the right of the view. On the Marks card, select the top Longitude (generated) tab. From Measures, drag Sales to Color on the top Longitude (generated) Marks card. The map on the left updates. On the top Longitude (generated) Marks card, click the + icon on the Country field to drill back down to the State level of detail. On the Marks card, click Color , and then select Edit Colors . In the Edit Colors dialog box ...