Grouping Expression
Click the Generate Grouping Expression button to auto generate a grouping expression based on the levels defined in your table data.
Similar to Grouping Expressions used in Sequence Dependencies and Proximity Constraints. Must evaluate to a text result. For most Table Plots, this should represent the XY coordinate Levels and Field positions.
Example: Text(Category) + "\\" + Text(Subcategory) + "\\" + Text(Tunnel)
Click Accept to generate a grouping expression based upon the levels you have selected (or Cancel).