Select all bars > Editor > Edit Interval Bar > Groups
If you have grouping variables or multiple graph variables on an interval plot, you can assign different attributes (colors) to each group.
Assign attributes by categorical variables: (Graphs with grouping variables only) Enter up to four columns of categorical grouping variables to assign different attributes (colors) to each group and display a legend.
Assign attributes by graph variables: (Graphs with multiple graph variables only) Check to assign different attributes (colors) for each graph variable and display a legend.
Apply attribute variables to other data displays: Check to update all data displays, such as symbols and connect lines, to use the same attribute variables as the interval bar.