The quick chart icons offer shortcuts to pre-configured chart types. They offer a faster way to configure between layouts like stacking vs grouped bars, mixed bar-line charts, or toggle between table / chart / markdown / advanced visualization without digging into the lower level menus.At times choosing between different quick charts will not impact the visualization (for example stacking / unstacking with only one dimension), so the query may need to be altered to enable the depth of each chart type. Omni will also take a best guess at the right quick chart for each new query, while attempting to retain ad hoc changes made across the specific configurations.