pdfPrintExpandSmallPages
Scale up pages that area smaller than the paper.
void pdfPrintExpandSmallPages(PDFHandle pdf, int expand)
If this function is called with
expand = 1, pages that
are smaller than the paper (or printable area) will be scaled up to
fill the paper.
pdfPrintResetParams resets this to its default value of 0, which
means to print pages smaller than the paper at actual size.
C:
pdfPrintExpandSmallPages(pdf, 1);