The DocHub editor allows you to easily Resize PDF display in on Mac in Preview. It’s easy to understand and requires no previous experience with similar editing tools. Simply add your file, and DocHub will take care of everything else, providing you with things like:
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To summarize the text: Open the PDF file in Preview. If Preview is not the default app, right-click the PDF and select Open With Preview. Click File in the menu bar, then Export. Type a file name, select Reduce File Size from the Quartz Filter drop-down menu, and click Save.