What is the state of this feature ? I think in particular with the upcoming side-by-side view of multiple pages, every millimeter counts on smaller screens.
As for the interface, I'd provide a 'autocrop' button that just removes the whitespace around pages, but then additional sliders on all four borders to further narrow the view (often, there are page-numbers or other text at the top/bottom of the page that should just be cropped away.
As for the interface, I'd provide a 'autocrop' button that just removes the whitespace around pages, but then additional sliders on all four borders to further narrow the view (often, there are page-numbers or other text at the top/bottom of the page that should just be cropped away.