button in the Classes field to open the Data
Classes dialog.You can also change the number of classes on the hatch map. In this example, we will change the number of classes and classification method so the hatch map displays eight classes of equal size.
Click on the map layer name in the Object Manager or click the Map | Layer | Layer Properties command to select the hatch map layer. See the "Viewing Map Layer Properties" section in the Editing Map Properties lesson for more information on selecting objects in the Object Manager and the Layer Properties command.
To change the number of classes and classification method:
1. Open the hatch map properties with one of the methods described above.
2. In the Property Manager, click on the General tab to view the General page.
3. Click the Use user-defined limits check box to enable editing in the Min limits and Max limits fields.
4. Type "0" into the Min limits field then press ENTER. Type "40000" into the Max limits field and press ENTER.
5. In the Property Manager, click on the Map tab to view the Map page.
6. Click
the
button in the Classes field to open the Data
Classes dialog.
7. Type
"8" into the Number of classes input box or click the 
button until the Number
of classes value is "8."
8. Click the Classification method: and select Equal intervals from the list. Notice the Increment field displays 5000. Also look at the Count column of the Objects in classes list. Notice there are no states in classes 5 or 7.
9. Click the OK button.
The hatch map now has 8 classes, each with a range of 5000. Because the population data is in thousands, each class size corresponds to 5 million people. Changing the number of classes, classification method, and hatch map colors lets you control the way your data is displayed.