The KeyboardDefaults control adds panning and zooming functions, controlled with the keyboard. By default arrow keys pan, +/- keys zoom & Page Up/Page Down/Home/End scroll by three quarters of a page.
This control has no visible appearance.
| OpenLayers. | The KeyboardDefaults control adds panning and zooming functions, controlled with the keyboard. | 
| Properties | |
| autoActivate | {Boolean} Activate the control when it is added to a map. | 
| slideFactor | Pixels to slide by. | 
| observeElement | {DOMelement|String} The DOM element to handle keys for. | 
| Constructor | |
| OpenLayers. |