graphicsscalingsphinx
I am using Sphinx and the plantuml package to include UML diagrams.
The plantuml package for Sphinx generates the following LaTeX code:
\includegraphics{%s}
Anyways – the diagrams are to big, so what I want is
\includegraphics[scale=0.75]{%s}
Can I – without patching the plantum package – set a default scale for \includegraphics in my LaTeX preamble?
Using the adjustbox package with the export option which extends graphicx with several new keys you can now simply use the max width key which scales the image down to that width if it is larger but doesn't scale it at all if it is smaller the equal to it. There are also the related keys max height, max size (for both width and height) as well as min width, min height and min size.
In your case simply use the following code:
\includegraphics[max width=\linewidth]{<image file name>}
Note that you can't set max width etc. in a global way using \setkeys{Gin}{max width=...}. It is implemented in a different way as width. However, I'm planning to add a possibility for this as well.
You can use the value stored in \Gin@nat@width, defining a handier interface to it:
\documentclass{article}
\usepackage{graphicx}
\setkeys{Gin}{width=30pt} % exaggerated for the example
\makeatletter
\let\ginnatwidth\Gin@nat@width
\makeatother
\begin{document}
\includegraphics{example-image-9x16}
\includegraphics[width=\ginnatwidth]{example-image-9x16}
\end{document}
Best Answer
There are two ways.
First way: set a default value for some keys.
(the natural width is stored in
\Gin@nat@width)Second way: add
scale=0.75to the passed options.