To make changes to a PDF file if you have a special editing tool is needed. Adobe, for example, offers a paid package.
Libghc-sha-prof is a PDF-editing program you can download for free.
UPDATE: This program is no longer actively maintained. We therefore recommend looking at alternatives to look at in our overview of free PDF software.
Libghc-sha-prof is a free tool for Windows and Unix operating systems that allows you to convert your PDF files you can edit. The software is open source and downloads are hosted on SourceForge.net.
Libghc-sha-prof has the following characteristics:
You can free download PDFedit and safe install the latest trial or new full version for Windows 10 (x32, 64 bit) from the official site.