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
E'S THE SECRET: You can combine at least two PDF files with this trick. Click the “File Open in the toolbar’. Click on add in the dialog box. In the dialog box, add a new name, type “Emerge”. Check the files ‹Show In Finder’ box. Click ‹Add. Click on PDF‹‾‾ with check. (The files‹ ‹View window is open.) Click ‹File‹‾‾ with check. The file explorer will open. If you don’t want to see thumbnails, then you can delete’ the Images‹ ‹Unassigned‹ folder. Click ‹Finish. To save the new PDF, right-click on it and Save. To convert the merged PDF to text, double-click it in the file explorer. On the Save As dialog box, enter your desired name, click ‹Save, and click OK. (Note: For both of the images, the format should be “JPG”.) If you have problems, check.