Group and Stack by Options
By selecting a metric for the y-axis and a field for the x-axis, you create one-dimensional charts. To add a second dimension, you can select fields for the "Group by" or "Stack by" options. In Tree Map and Circular gadgets, these functions are named "Level 2" and "Level 3." In the Scatter Plot gadget, you can only "Group by." In the Heat Map gadget, you must select both vertical and horizontal fields to display.