
To select multiple pages, hold down the CMD key. Then select the PDF pages you want to merge or combine.For all the PDF documents open in Preview, select View > Thumbnails from the Preview Toolbar at the top of the window.

If you’ve only got two PDFs you want to merge, it’s a bit easier to stay organized. If you find that the PDF keeps opening in another application instead of Preview, Ctrl-click on the PDF file and select “Open With” from the menu and select Preview: If you’ve got lots of PDF files that you want to join, this will mean you have a lot of Preview windows open on your desktop so try and keep them organized.

Open all of the PDF files you want to merge in separate Preview windows.Simply follow these instructions to join PDF files on your Mac using macOS Preview. The Best Desktop Publishing Software For Mac.How To Sign & Edit PDF Forms On Mac For Free.
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It also works on the latest Apple Silicon M1 Macs.
