You can create PDF from single or multiple photos at a time. And the photos can be in different image formats. To create a PDF from a single photo, you can click the “Create PDF” button; If you want to create a PDF from multiple photos, you can click the “Combine PDF” button. Before saving the files into PDF, you can make the file size smaller by tweaking the image quality. To do this, go to the “File” menu and choose “Optimize > Custom”. Then you can customize image PDF, quality and more. For more details, you can read. How to Convert Photo to PDF
To print the file, the user simply clicks to print the PDF file. That is, clicking to print the file is a consent to print the file. The password will expire after about 7-9 days. When you need to edit the file, you are going to need to know the password. I've seen many passwords that were valid only for the current session of the computer. As long as the program is closed, you are going to continue using it without the password. Even if the password doesn't expire, you must change it at least each time you use the program. The same is true on many Internet-based computer systems. If someone changes the password before you are certain your software is not compromised, you could be compromised. The process of changing the password or adding a user to your system. Is known as “hacking”. You can read more.