Applying options to already loaded package

Question

Is there a way to apply some options to a package which is loaded in the cls file I am using? For instance, suppose that the cls file loads graphicx, and I want to apply the option demo to it from my tex file.

score 73 · Accepted Answer · answered Jul 15 '13 at 08:31

If a package is loaded, the option setting code in the package is already processed and gone. Thus in general you cannot change package options later.

`\PassOptionsToPackage`

But you can specify options earlier, before loading the package. Apart from a global option (with side effects for other packages) \PassOptionsToPackage can be even used before \documentclass, e.g.:

\PassOptionsToPackage{demo}{graphicx}
\documentclass{article}
\usepackage{graphicx}

\begin{document}
\includegraphics{foobar}
\end{document}

Package interface for loading options

Sometimes a package or class allows the setting of a subset of options later. For example, package hyperref provides \hypersetup. Also some options of package graphicx (or rather for \includegraphics) can be set via:

\setkeys{Gin}{<options>}

However, the option demo is not supported this way.

I guess there is no way of removing a package option that is set by the class (unless there is a package interface for loading options)? — , Dec 13 '16 at 15:00

score 23 · Answer 2 · answered Jul 15 '13 at 08:30

23

Use

\PassOptionsToPackage{demo}{graphicx}

before the line with \documentclass

answered Jul 15 '13 at 08:30

karlkoeller

124,410

Applying options to already loaded package

2 Answers2

`\PassOptionsToPackage`

Package interface for loading options

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