By Jeffye, on August 14th, 2010

Telling pdflatex To Use Letter Size Paper
Pdflatex is using the wrong margins. How can I fix it?
This problem is sometimes caused by the PDF page height and width not being specified correctly. Put the following right after your \begin{document} command:
\special{papersize=8.5in,11in}
\setlength{\pdfpageheight}{\paperheight}
\setlength{\pdfpagewidth}{\paperwidth}
% You may need to change the horizontal offset to do what you
% want. Setting \hoffset to [...]
By Jeffye, on February 22nd, 2010

Advantages of pdfLaTeX
LaTeX users generate postscript output using dvips. An alternative is to use pdfTeX to generate PDF files directly. The PDF format offers a number of advantages over postscript:
Smaller uncompressed file sizes.
Much more efficient bitmap inclusion.
Availability of hyperlinks.
Better accessibility for inexperienced users.
Adobe’s Acrobat reader offers facilities for electronic presentations
Limitation of pdfTeX
1. postscript figures cannot [...]