adjusting position of page numbers in bound in PDF pages

Question

My document consists of three parts, where part two is an external PDF which I bound in using the \includepdf command from the pdfpages package. I managed to place page numbers on these pages by use of the option pagecommand={}; e.g. \includepdf[pages=2,noautoscale,pagecommand={}]{Part_2.pdf}.

There is, however, one subtle thing I'd like to have adjusted: As it is now, all page numbers are displayed in the respective top outer corner. However I would like to have the page number of the first page of the PDF to be displayed in the middle at the bottom.

How can I do that? (The document class used is amsbook)

Answer 1

Insert the first page with the pagecommand -- pagecommand={\thispagestyle{plain}} and rest of the pages with pagecommand={}.

\documentclass{amsbook}
\usepackage{pdfpages}

\begin{document}
\includepdf[pages=-,noautoscale,pagecommand={\thispagestyle{plain}}]{duck1.pdf} %% first page - put pages=1
\includepdf[pages=-,noautoscale,pagecommand={}]{duck2.pdf} %% second page put pages=2-2 instead of pages=-
\end{document}

Picture courtesy by @Paulo Cereda (Thanks Paulo -- more ducks!)