You can rotate, delete and reorder pages from the thumbnail section, too. (If you have macOS Sierra or earlier, drag the thumbnails directly into a thumbnail in the other PDF.) Drag the selected thumbnails to the sidebar of the other PDF, and release where you want them to go.Press and hold the Command key, and select the page thumbnails that you want to add to the other document.You'll see page thumbnails in the sidebar. In each document, choose View > Thumbnails.Open the PDFs you want to combine in Preview.Select the PDF you want to add, and click Open.Īnd here's how to combine parts of one PDF with another PDF:.Check the permissions of a PDF by choosing Tools > Show Inspector, then click the lock icon).

Some encrypted PDF documents can't be merged, according to Click Edit > Insert > Page from File (if the Page from File selection is dimmed so you can't click it, make sure that the file you have open is a PDF.Select the thumbnail for the page where you want to insert the other document.

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