Sometimes I need to see and read two different parts of the same document at the same time (e.g. reading the explanation of a chart while viewing it). How can I do that? Is there any PDF reader with that feature or do you open the same file twice?
According to How do I use Revu's Split View mode on a single monitor or with multiple monitors? Bluebeam has this feature. Unfortunately there is no Mac version and it is very expensive.
I also found this discussion thread recommending STDU Viewer but it is also for Windows only: How to view two not continuous PDF pages at once,like the split view of Word .