When a categorical variable is added to the Group X or Group Y zone, a partition is created for each level of the variable.
When a continuous variable is added to a grouping zone, Graph Builder uses quantiles of the data to divide the variable into five groups. To change the number of groups:
1. Right-click the grouping variable label and select Number of Levels.
2. Type in the number of levels that you want to display.
3. Click OK.