In the past, to edit PDF files, specialized PDF processing software was required. However, starting from Word 2016, a robust PDF editing feature is integrated, and if you are not aware of this feature, follow the article below.

Here is how to edit PDF files with Word 2016, and the process is similar for earlier versions of Word as well.
Step 1: Open the PDF file in Word 2016
Method 1: Launch Microsoft Word 2016, on the interface, select File.

Next, choose Open -> Browse.

In the Open dialog box, navigate to the folder containing the PDF file you want to edit and press Open to open the file.

Method 2

Afterward, select Word 2016 and press OK.

A message will appear: Word will now convert your PDF to an editable Word document... Click OK to confirm the conversion from PDF to Word.

If additional notifications appear, click OK as sometimes Word may encounter content in your PDF that it cannot convert, prompting a notification.
Note: When converting to Word, the document may not display the correct page numbers as in the PDF. Some graphics and content may be altered or even disappear entirely.
Step 2: Edit PDF with Word 2016
Once you've opened the PDF file with Word 2016, you can edit it like a regular Word document, utilizing various tools on Word 2016's toolbar. Easily modify the document content to fit your needs.

Step 3: Save the Edited File
After completing document edits, save the file by pressing the Ctrl + S shortcut or selecting File.

Next, choose Save or Save As -> Browse.

In the Save As window, navigate to the location to save the file. Then, select the file format in the Save as type: section.
- If you want to save in PDF format, choose Save as type: PDF.
- If you prefer saving in Word format for easier editing, leave Save as type: as Word Document.
Finally, click Save to confirm.

Here is how to edit a PDF file using Word 2016. If you don't have Word 2016 installed on your computer, you can explore editing PDFs with the PDF reader software Foxit PhantomPDF at this link: https://Mytour/cach-chinh-sua-file-pdf-bang-foxit-phantompdf/
Wishing you success in your PDF editing endeavors!