If you insert the PDF into your PowerPoint as an image, you'll have to insert at most one page at a time. Visit Business Insider's Tech Reference library for more stories.

Outlook 2013 supports the inclusion of JPG, GIF, PNG and BMP image files directly in a signature. To add a PDF image, you must include it as a Web link.

Repeat the same steps to insert more PDF files into the sheet. Adjust the inserted PDF File with the Cell Resize the PDF file so that it fits perfectly in the cell.