The DocHub editor allows you to quickly Compress PDF size in Preview on Mac. It’s easy to understand and requires no prior experience with similar editing solutions. Simply upload your file, and DocHub will take care of the rest, providing you with things like:
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To open a PDF, use Preview by right-clicking on it. If not your default app, open with Preview. In the menu, click File and then Export. Type a name for the file, choose Reduce File Size from Quartz Filter, and click Save.