|Tip 247||Speed Up Slow PDFs|
Sometimes you might find that someone sends you a PDF that is very slow when you view it in Preview—scrolling takes a long time, for example, and pages draw slowly too. It’s not always clear why this happens, but it might have to do with the number of layers in the document.
A quick and easy solution is to use Preview to save a copy of the file (select File→Export, and then assign a different filename). Open the copy, and you should find it’s now much quicker to browse.