Step 1: Coloring/Editing the Map

Single Selection

Select the color you want and click a subdivision on the map. Right-click on it to remove its color or hide it.

Hold Ctrl and move your mouse over the map to quickly color several countries/subdivisions. Holding Ctrl + Shift has the opposite result.

More Options

Step 2: Choosing the Legend

Add the title you want for the map's legend and choose a label for each color group. Change the color for all subdivisions in a group by clicking on it.

Legend Style
Color Label Remove
Step 3: Getting the Map

When ready, select Preview Map. To download the map: Right Click -> Save Image or select Download Map. In case you want to change something, select Edit. To start over, select Clear All.

Download Map Undo

Check this blog post for more details about the map.