Pitney Bowes MapInfo Professional - Manual (Page 281)

3. Click Ranges and select a template name from the list.
This is the style of the thematic map you are creating.
4. Click Next.
The Create Thematic Map - Step 2 of 3 wizard panel opens.
5. Click USA, this is the table you want to shade.
6. In the Field drop-down list, select Join.
The Update Column for Thematic dialog box opens.
281 MapInfo Professional User Guide
Chapter 10: Creating Thematic and Other Themed Maps