Additional Pan and Zoom customisation

[marijnkampf]

I choose your screen saver because it had the zoom function. I see however that some picutres are zoomed in a lot and I never see the whole picture.

So it would be nice to be able to configure the zoom function with eg:

• max zoom level
• min zoom level
• zoom out to full picture (on or off)
• Zoom in from full picture (on or off)