Google Maps - Modifying Controls
Several of the map controls are configurable.
The controls can be modified by specifying control options fields.
For example, options for modifying a Zoom control are specified in the zoomControlOptions field. The zoomControlOptions field may contain:
google.maps.ZoomControlStyle.SMALL - displays a mini-zoom control (only + and - buttons)
google.maps.ZoomControlStyle.LARGE - displays the standard zoom slider control
google.maps.ZoomControlStyle.DEFAULT - picks the best zoom control based on device and map size
Example