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how to create PDF in grayscale mode or TikZ figure only?

How to convert tikz figure in monochrome?

Example:

\documentclass{article}
\usepackage{tikz}

\begin{document}

\begin{tikzpicture}
   \draw[red] circle (1);
\end{tikzpicture}

\end{document}

But i need the below result:

enter image description here

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marked as duplicate by Jake, Regis da Silva, Peter Grill, Torbjørn T., lockstep Jul 19 '12 at 15:54

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1  
Didn't you ask exactly that question before? tex.stackexchange.com/questions/25703/… –  Jake Jul 19 '12 at 2:24
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1 Answer 1

If the monochrome model must be applied to all the document, you can pass the monochrome option to xcolor:

\PassOptionsToPackage{monochrome}{xcolor}
\documentclass{article}
\usepackage{tikz}

\begin{document}

\begin{tikzpicture}
   \draw[red] circle (1);
\end{tikzpicture}

\end{document}

enter image description here

For some particular tikzfigure environment(s) you can use the approach mentioned by Jake in his answer to how to create PDF in grayscale mode or TikZ figure only?.

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1  
However this will change the colour mode for the entire document, not only the tikz figure. This is fine if the figure is in a standalone file, but as part of a bigger document, you may not want to do that. The answer provided by @jake in the question he linked is probably more appropriate. –  ArTourter Jul 19 '12 at 2:37
    
@ArTourter you're right. I've added some comment about this to my answer. Thank you! –  Gonzalo Medina Jul 19 '12 at 2:40
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