Preview - Export to PDF without margins Preview (like most Mac apps) can print to PDFs, and even has a shortcut for this functionality via a menu option Export as PDF.... I have a scanned document in .tiff format that I'd like to convert to a PDF, but using the option above yields a PDF with large margins around the image file. Is there a reason why this is happening? More importantly, is there a way to suppress these margins?
If you don't want any borders, create a custom paper size and change margin size to 0 as shown below:


Name your custom paper size, use it and create PDF.