What is the purpose of Add Theme?
To analyze data values associated with your map. The map objects can be shaded according to the data values (ranged, individual value), or thematic objects are created to display the data values. You can create single-variable thematic maps (ranged, individual value, dot density, graduated symbols) or multi-variable thematic maps such as pie and bar charts.
When is Add Theme active?
When a Map window is active.
How do I access Add Theme?
On the MAP tab, in the Content group, click Add Theme to open the Create Thematic Map - Step 1 of 3 dialog box.