Controls
Click the Plus or Minus buttons or drag the slider to zoom
(The Map setting only works between certain values - if you get just grey then switch to Satelite mode)
Click Map , Satelite, Hybrid or Earth* to change viewing options
Click the arrows or 'Click and Drag' to move
Click the box in the centre of the arrows to reset the map.

*The Earth option will change the map to a 3D version - for this to work you will need to have installed the Google Earth plugin

Corralejo