HERE’s ONE WAY… We routinely install on every PC a ‘FREEWare’ product we like called PDF reDirect (there are several other completing tools too) that allows you to select it as a printer from any application that can print, and then starts-up the PDF reDirect software to create a PDF with a name you prefer and a location you navigate to. Features of PDF reDirect that are relevant to your “…join PDFs into one PDF…” question include the ability to merge selected PDFs together into a larger PDF file. Here’s a snap-shot sample of how it works. Open PDF reDirect and navigate to the PDF’s to be combined one-by-one (See ‘A’, ‘B’, and ‘C’ below) Click the Plus (e.g. add button) to add each PDF in order. (See ‘D’) When all the PDFs to be merged are present give the new merged PDF a name (See ‘E’) Press the [Save] button (See ‘F’) Another feature if interest is the ability to be viewing a PDF inside a viewer like ‘Rotate Pdf Online Reader DC’ and then choosing to print only selected pages that themselves become a PDF.
You can now save the PDF file with PDF Split and Merge Tool.