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How to combine PDF files
From Adobe Acrobat to free online editors and built-in tools, here’s how to merge multiple PDFs into one document.
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Master Excel with these Workflow Features
Microsoft Excel is a wonderful program that allows you to do so much for work, school, and more. In fact, it can be an ...
A useful reference for understanding the PDF file format and the eventual usage of this library is the PDF 1.7 Reference Document. The PDF 2.0 specification is available here. lopdf now includes full ...
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