There are 2 main map styles: Speed Maps and Organic. Speed Maps have 4 different styles choose from; Box map (default), Direction Map, Line Map and Gradient Map.
To change the style of a map from a Speed Map style to Organic, go to the colorful icon in the top right-hand corner of the screen.
From the drop-down, choose "View as Organic Map".
The Speed Map will now be changed to an organic Organic Map:
To change from an Organic Map to a Speed Map, open the slider menu.
The choose "View as Speed Map" from the menu.
There are 4 different Speed Map styles to choose from. To change style open the slider menu, then choose "Styles" from the menu.
You will see the 4 speed map styles in the drop-down. scroll down to view them all. Click 'Select' to choose one of them.
Once selected, your map will instantly change to reflect the new style you have chosen.