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Re:PEP – An open source PDF editor for Mac by MKais on Tuesday September 15, 2020 @04:08PM (#24486158)
The PDF file format specification has 971 pages. https://www.iso.org/standard/63534.html
Re:PEP – An open source PDF editor for Mac by threcius on Wednesday September 16, 2020 @10:05AM (#24492802)
Just create a simple PDF example by using TextEdit's export function, and open the PDF with a plain text editor, you should be easy to figure out what's going on in PDF.
Re:PEP – An open source PDF editor for Mac by threcius on Wednesday September 16, 2020 @10:03AM (#24492787)
AFAIK, if you read through the first few chapters of the PDF spec, then you can easily understand later chapters. PDF in itself is a simple format.