The General settings tab contains settings such as responsiveness, dimensions, map type (satellite, terrain, etc), and fullscreen functionality. Start here to apply some basic customizations to your map.
The editor give you a couple of options for the initial location of the map. From the Location tab, at the top choose either Address or Custom.
The Google Maps API gives you complete control of how the map will look like. You can change the color or visibility of every feature that you see on the map. The downside of having complete control is that you might have to play around with the settings to achieve exactly what you need.
The concept is relatively simple - the major elements of the map such as roads and terrain are called features. Each feature is made up of a few elements. Each element can have different styles applied to it.
Different features of the map are organized into broad groups. For example the Landscape group contains Man Made, Natural and other features.
Each feature can have some of the following elements:
Each element can have multiple styles:
With the hierarchy explained, here is a quick example. If you want to make all roads blue, you would select Road, then All styles, set Color Type to Custom and finally select a color. An icon will appear next to the element that has styles applied to it and you can click it to revert to defaults. That's it!
Additionally, you can import a map style generated by another tool, or use a preset.