On a Apple computer, the “Print” function of the “Preview” app includes the choice for printing the open file to PDF. This works for converting various picture formats to PDF. In fact, any open printable file can be printed as a PDF. If your objective is to make a PDF into a searchable PDF, Word To Pdf Conversion works. There are some “free” software listings on the Internet, but I can’t suggest one or another. On a Apple computer, if you just want to merge two or more PDF files, click theft-most icon above the main PDF window. There’s dropdown with several choices. The second is to open “thumbnails”. Click it; you get thumbnails of every slide in your PDF file. Do this with both of the files you want to merge. Drag thumbnails from one file to the other - in the order you choose. You now have the merged file. (This is probably identical in the Windows operating system.) HTH
O ‑ THE ‛ PDF MANAGER I have only two brief tips with this one. (Those are only a suggestion — you can’t control everything and do things by default.) First, try using Adobe Reader. It’ll open any open file in your Windows system with the ability to print. Also, if you need to display the entire open PDF file in the ‛PDF menu, use Adobe Reader. In fact, if you want to open a PDF file in Adobe Reader, the following shortcut will open in the browser: File ‐ Open ‐ PDF in Adobe Reader. Note that it’s not a default .pdf application, so you have to go to the Internet and download it. Now, that you’ve learned how to convert an Open Format (PDF) to Open Format (OCR), to create a ‛searchable open PDF, and to use a PDF viewer to view the Open.