The more text objects associated with a category, the more accurate a classification model will be at assigning items to that category. For a quick way of seeing the most-populated categories in an FAQ object source tree (that is, the categories that have the most text objects):
Right-click anywhere on the Full Category Tree subtab and select Highlight top categories. The Highlight most-populated categories dialog box displays.
Enter the number of categories to show. If you want to see the 25 most-populated categories, enter 25.
Select the Choose from selected Categories only check box if you want the calculation to consider only the categories that you have selected for inclusion in the FAQ object (the ones with [+] status).
Click OK. The dialog box closes, and the center pane highlights the most-populated categories in red.