How do I make a PDF with multiple pages ?

If you’re using the Adobe Suite, Illustrator offers a system of artboards that allows you to create multi-page PDFs. On this programme, an artboard is equivalent to one page of a PDF. You just need to create as many artboards as you need and put your images on them. On other programmes (notably Inkscape), it is possible that you won’t have this option. But you can always search in your PDF reader (Acrobat, PDF-Xchange, Foxit…) because it will probably suggest how you can combine multiple PDFs into one.

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How do I make a PDF with multiple pages ?