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Step 2: Make sure to display the thumbnails on the left side using View > Thumbnails. You’ll see two Preview windows open, with a PDF file in each one. Step 1: Open the PDF files in Preview as described in step 1 above. You can use more than two files if needed, but for the purposes of this how-to, we’ll simply use two PDFs.
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This is doable with Preview on Mac as well. Instead of splitting a PDF into separate files, you may have two or more files that you want to combine into a single PDF. Then, select the thumbnails for the pages and go to Edit > Delete. If you want to remove those pages from the original PDF, return to the file in Preview.
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Step 5: You’ll then see a new PDF file on your desktop with the pages you extracted from the other PDF. This does not remove the pages from the PDF but merely copies them. Step 4: With the pages selected, drag them out of Preview onto your desktop. You'll see the selected page numbers highlighted in blue.
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