Change behavior of geometry for all pages

Question

I'm using the llncs document class and wanted to change the margin of all pages, using the geometry package.

I use the following command:

\usepackage[left=3.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm]{geometry}

The problem is that the left margin is switching between odd and even pages. Even numbered pages have the 'left' margin on the right side and the odd numbered pages have the 'left' margin on the actual left side.

I don't know if this is a problem with llncs or geometry (thus, the title could be misleading), but how would I tell my document to have the left margin on the actual left side, for every page?

Answer 1

The llncs class loads the article class with the twoside option and doesn't have a oneside option. You can revert back to "oneside" by switching manually:

\makeatletter
\let\@twosidetrue\@twosidefalse
\let\@mparswitchtrue\@mparswitchfalse
\makeatother

\documentclass{llncs}
\usepackage[left=3.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm]{geometry}