Tableau Desktop Foundations Practice Question

To stack the bars by a second dimension, you need to encode that dimension on the Marks card so Tableau layers its members within each bar. Dragging the discrete dimension Region to the Color shelf causes Tableau to draw one colored segment per Region and stack those segments vertically (because the mark type is Bar). Moving Region to Size or Shape changes mark properties but does not produce stacking, while adding Region to Columns creates separate side-by-side bars. Adding another measure simply creates a dual-axis or combined view, not a stacked bar.