If you’re reading a pdf with multiple pages, zooming out to show the entire page (or even displaying two pages at once if your display is wide enough) enables super-fast scrolling through the document. I have seen people not do this and it was painful to watch.
Also, some pdf readers (including adobe reader) have a “magnifying glass” feature, which achieves what you described without having to open the document a second time.
If you’re reading a pdf with multiple pages, zooming out to show the entire page (or even displaying two pages at once if your display is wide enough) enables super-fast scrolling through the document. I have seen people not do this and it was painful to watch.
Also, some pdf readers (including adobe reader) have a “magnifying glass” feature, which achieves what you described without having to open the document a second time.
Oh god, the scrolling, the cumative man-hours I’ve wasted. How did I never see this before.