gvSIG-Desktop 1.12. User manual
There are several tools you can use to navigate around the view.
Zoom in: Enlarges a particular area of the view.
Zoom out: Reduces a particular area of the view.
Full extent: Full zoom of the total area included in all the layers of the view.
Panning: This allows you to change the view zoom by dragging the viewing field all over the view with the mouse. Click and hold down the left button of the mouse then move the mouse in the direction you require.