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Is there a way to open two views of the same PDF in Preview (without creating two copies of the file), or perhaps split the window and show two different pages at the same time?

This is very useful when reading a paper which refers back to equations on previous pages.

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2 Answers 2

up vote 2 down vote accepted

Skim has menu items for marking a page and going back to a marked page. You can assign shortcuts to them in System Preferences.

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It seems Skim has a split view too. It's probably better to use Skim instead of preview. Thanks for the suggestion! –  Szabolcs Nov 29 '12 at 16:37
More directly in Skim, one can hold the Cmd key and click somewhere in your document. A new "view"/window will open centered on where you clicked and both windows can now scroll independently. –  Sam Mason Jan 28 '14 at 11:29

Opening the first one regularly and then using the open command, with the -n option, should do the trick.

To do so just:

  1. Open the Terminal.app
  2. type open -n and drap the file to the Terminal window. The full path of the file will appear after what you've typed.
  3. Hit enter.

The -noption opens a new instance of the application (in this case the default one, as no other is specified), even if one is already running.

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Excellent! Is there a GUI way to do this? Would services be the way to set it up (if I use it often)? (New OS X user) –  Szabolcs Nov 27 '12 at 14:29
@Szabolcs It will be an approach, indeed. –  Thecafremo Nov 27 '12 at 14:37

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