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 — PDF Converter The HATH program from EAC makes PDF files as fast as a plain TIFF. You just have to select them, right-click, choose PDF and PDF’ on the’next’ page. You can also export ‐PDF‒to the ‹Converter’ for use in other apps. (These pages are still under development.) PDFs are converted at very high speed and look absolutely beautiful. You don’t have to edit them at all, and you can easily add images. There is also a powerful way to format your PDF at any size. If PDF is a picture format, then PDF is also as a very good image format. It is easy to change size and orientation for almost any type of image. All kinds of photo, graphic and PDF image formats now work, including JPEG. If your images consist of several layers, then use the ‥Layer‖ menu. Then choose the appropriate one.