The DocHub editor enables you to easily Attach pages to PDF in Preview. It’s easy to grasp and requires no previous experience with similar editing solutions. Simply add your file, and DocHub will take care of the rest, giving you things like:
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In the Mac OS Mojave Preview app, you can easily split and merge PDFs. To split a PDF, select the pages you want to separate and delete them. For example, you can split a 4-page PDF into two separate documents by deleting pages 3 and 4. Alternatively, you can select the first two pages and delete them to keep pages 3 and 4 together. Undo changes by using Command Z.