[Anak]

Yes, you can scroll the document when some zooming factor is selected.
But if you choose no zoom (zoom level to minimum), fit to width or fit to hight you can't scroll through document page sizes that are bigger than the screen szie of the device.
If I rotate a portrait orentated CBR to landscape rougly only one half of the page is visible but you can not scroll to the non visible part of the page. So, there is no up or down scrolling possible.
When you zoom in one notch you can scroll through the document but then the document doesn't fit the width anymore so you must constantly scroll from left to right and up and down.