This software allows adding letter paper to existing or new PDF documents. Users can select from various letter paper PDF files and choose one or multiple source PDF files to attach the paper to.

This means you'll be able to customize your letters and documents with your very own logo or complete letterhead. Whether you're an individual looking to add a personal touch to your PDF files or a business looking to create professional-looking documents, this software has you covered.
One of the best things about this software is that you can also call it from the command line. This means you can add your letter paper to multiple PDF files in one go, without having to open each one individually. All you need to do is enter the command: pdfletter.exe 'letterpaper.pdf' 'file1.pdf' 'file2.pdf', and the program will take care of the rest.
Another great feature of this software is that it can open existing PDF files and save them with a new background. This means you can easily update your existing documents with your new letter paper, without having to start from scratch.
Overall, if you're looking for an easy and efficient way to add your letter paper to PDF documents, this software is definitely worth checking out.
Version 1.0: First release