Inkscape: How can I make a multi-paged document in it?

Today there is no native multi-page support in Inkscape due to limitations of the strictly implemented SVG specifications (multi-page support was only introduced in SVG 1.2. draft which was never released but dropped in favour of the upcoming SVG 2.0).

To overcome this an external plugin inkscape-pages provides multi-page support through generating a master page with links to subpages. However this plugin will not produce SVG 2.0 code for future compatibility. Nevertheless it will help creating multiple pages for later export to PDF (e.g. with the help of pdftk ).

If there are not many pages, try saving them as separate single page PDF files after editing with Inkscape and then merge using some tool like PDF fill. I do not know if it may lead to some problems later, but it worked for me when I tried with 3 PDF files.