In the following code, I want to center horizontally the text area (main body+margin area), but the centering option of the geometry package doesn't have any affects. Is there a way to do this?
\documentclass[a4paper,symmetric,showframe,centering]{tufte-book}
\usepackage{lipsum}
\begin{document}
\lipsum[1-2]
\end{document}

I know that something like \PassOptionsToPackage{right=8.2cm}{geometry} can do the job, but I think it should be there a logical way.
Tuftebook – Mar 21 '15 at 19:22\geometrymacro to override any geometry options you like in the preamble of your document. Just specify what you'd like to use for the left and right margins, text area, etc. – godbyk Mar 21 '15 at 19:53\geometry{left=30mm, right=30mm}solves your problem. – Bobyandbob Nov 19 '17 at 22:12