First things first, you need Adobe Acrobat Pro. This functionality isn’t available in Adobe Reader. If you’re only tackling a few PDFs, take advantage of Adobe’s 7-day free trial. For ongoing needs, a ...
Use Preview: Open the PDF in Preview, click File > Export, select “Reduce File Size” under Quartz Filter, and save. Use ColorSync Utility: Open the PDF in ColorSync Utility, click File > Export, ...
The PDF format is meant to be non-editable, but if you scan a document that comes out too light or receive a contract with type that is too faint to read, you need a way to darken a PDF. Here are a ...
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