The Map button shows a color coded zone map. While the map is active, the zone buttons in Lumenzia are colored as a reference (CS6 users may open the gradient in the red visualization layer to see the mapping). Cooler colors (such as blue) are used for dark zones, while pregresively warmer colors (up to red) represent lighter zones. Click X or Map (again) to clear the visualization.
You may use the zone pickers while the map is active for convenience, or dismiss the map and use zone pickers for more precise selection of zones.