The information contained in each file (title, subject, comments, etc.) must be edited individually, which is a great heaviness if there are many files to modify. For these cases, what is needed is File Information Editor, which allows you to conveniently edit the information of multiple files at once.
The information of all the fields, File Information Editor shows it in spreadsheet format. In this way it is faster to update each of these fields, as it allows you to copy and paste between different cells, search / replace the content, rename, delete the values of all the cells you select, and so on. It also allows you to copy the stored information to the clipboard.
Some of the properties that File Information Editor allows you to view or modify are: title, author, category, character counter, comments, dates, keywords, last print date, subject, and so on.
You can free download File Information Editor 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.