What is the main advantage to data visualization by using a lens for zooming?
1) The lens zooms only a portion of the display which is faster than zooming the entire display.
2) The lens zooms only a portion of the data which is faster than zooming all of the data.
3) A lens separates nearby data items to help resolve detail while retaining the spatial context of the whole dataset.
4) A lens provides easy access to changing the magnification of the zoom.