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2013年7月2日 · Open the PDF with Acrobat, and pick File->Preferences. Information about the original file may be in a few places. Many programs that output PDF will put the filename in the Title field. Information about the creator of the file can be found in the PDF Producer field.

2024年11月23日 · If you opened the PDF directly in your browser, you might find the original file in your browser's download history or cache. You can also try right-clicking on the saved PDF file in your documents folder and selecting "Restore previous versions" to see if there's an older version available.

2019年3月17日 · I created pdf file (by printing word doc in pdf format), saved in my home computer, then use free metadata editor to change author/creator of the file, but can people (with computer knowledge) can still find out who the original author was?

2018年2月12日 · If you have “replaced” the file by saving over it, you've done exactly what asked the system to do. Depending upon whether the disk sectors were actually overwritten or different disk sectors were used for the new copy, you might be able to use one or another third party “deleted file recovery” utility programs to recover the old file.

2018年12月11日 · Fundamentally: browsers do not modify file content, so there is no way to know where a file was actually retrieved from. Your best option is the browser history. At a pinch you could try searching for text in the PDF to see if the results refresh your memory.

2 天之前 · Search, Edit, Fill, Sign, Fax & Save PDF Online. Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.

2023年12月7日 · Anyway: I would like to automatically save the output file (with the TOC) as the original file. That is, I do not want to have two files (keeping the original without the TOC). I tried: pdftocio -o original.pdf original.pdf < toc but I get an error: save to original must be incremental

Did you use File>Save to save your document or File>Save As and selected the original filename (and therefore overwriting the original file)? There is a big difference between the two save mechanisms, and if you've only used "Save", you may be able to recover your document.

Acrobat provides an easy way to check what program created a PDF document. Choose "File > Properties...". Look at the "Document Properties" dialog box. Check under "Application" and see what program created the PDF. Common values are Microsoft Word or InDesign.