Zoom in, zoom out, move map - which is the easiest way?
Basically you can use either the buttons of GoogleMaps or the mouse solely. Zooming and panning using the mouse or the buttons can be used on the locr website as well as with the locr GPS Photo software.

Zooming and panning with the mouse
Zooming and panning using the buttons
NOTE: You can also zoom using the scroll wheel of your mouse - if you mouse has a scroll wheel. Try out.