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Since in my document I have to write a lot of math in colored box, I'd like to avoid to write $ inside every box. Is there a way to define newtcbox in math mode?

I tried with \newtcbox{\mywbox}[1]{<options>}{$\displaystyle #1$} but it doesn't work.

This is my latex code:

\usepackage{tcolorbox} \newtcbox{\mywbox}{on line,colback=white,colframe=black,size=fbox,arc=3pt,boxrule=0.8pt} \begin{document} \obeylines This \mywbox{$3x$} is in line math. This $$y=\mywbox{$-5x$}-5+6$$ is not in line math. \end{document}

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I read about \tcboxmath and \tcbhighmath in the official tcolorbox manual, but I don't understand how to define them simply as the newtcbox and if they are what I need.

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2 Answers 2

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7

I would say

\newtcbox{\mywboxtext}{on line,colback=white,colframe=black,size=fbox,arc=3pt,boxrule=0.8pt} \newcommand{\mywboxmath}[1]{\mywboxtext{$#1$}}

Your example can become

\documentclass{article} \usepackage{tcolorbox} \newtcbox{\mywboxtext}{on line,colback=white,colframe=black,size=fbox,arc=3pt,boxrule=0.8pt} \newcommand{\mywboxmath}[1]{\mywboxtext{$#1$}} \begin{document} This \mywboxmath{3x} is in line math and this \[ y=\mywboxmath{-5x}-5+6 \] is display math. \end{document}

enter image description here

Change the names to your liking.

Avoid $$ in LaTeX (and of course also \obeylines).

Should you need the boxes to behave in subscripts or superscripts, change the code into

\documentclass{article} \usepackage{tcolorbox} \newtcbox{\mywboxtext}{on line,colback=white,colframe=black,size=fbox,arc=3pt,boxrule=0.8pt} \makeatletter \newcommand{\mywboxmath}[1]{\mathpalette\mywboxmath@do{#1}} \newcommand{\mywboxmath@do}[2]{\mywboxtext{$\m@th#1#2$}} \makeatother \begin{document} This $\mywboxmath{3x}$ is in line math and this \[ y_{\mywboxmath{0}}=\mywboxmath{-5x}-5+6 \] is display math. \end{document}

Note that in this case you need that \mywboxmath is in math mode.

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13

You can do this using \tcboxmath from the theorems library of tcolorbox:

\documentclass{article} \usepackage{tcolorbox} \tcbuselibrary{theorems} \newcommand*{\mywbox}{% \tcboxmath[colback=white, colframe=black, size=fbox, arc=3pt, boxrule=0.8pt]% } \begin{document} This \mywbox{3x} is in line math. This \[ y = \mywbox{-5x} - 5 + 6 \] is not in line math. \end{document}

Screenshot

You may want to abstract things a little bit using a style too, so that you can apply it to other boxes should the need arise:

\documentclass{article} \usepackage{tcolorbox} \tcbuselibrary{theorems} \tcbset{my math box/.style={ colback=white, colframe=black, size=fbox, arc=3pt, boxrule=0.8pt} } \newcommand*{\mywbox}{\tcboxmath[my math box]} \begin{document} This \mywbox{3x} is in line math. This \[ y = \mywbox{-5x} - 5 + 6 \] is not in line math. \end{document}

Making the background of the box transparent

This can be done using /tcb/opacityback and a skin using a jigsaw frame engine, such as standard jigsaw or enhanced jigsaw.

\documentclass[fleqn]{article} \usepackage{tcolorbox} \tcbuselibrary{theorems} \tcbset{ my math box/.style={ standard jigsaw, % useful for 'opacityback' and 'opacityframe' colback=green!20, colframe=black, size=fbox, arc=3pt, boxrule=0.8pt, opacityback=0.6, } } \newcommand*{\mywbox}{\tcboxmath[my math box]} \begin{document} This \makebox[0pt]{% \raisebox{-0.5\height}[0pt][0pt]{\hspace{1cm}\includegraphics{example-image-duck}}% }% \mywbox{3x} is in line math. This \[ y = \mywbox{-5x} - 5 + 6 \] is not in line math. \end{document}

enter image description here

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  • Is there a way to make the back of the layer/box transparent respectively lower the opacity? Commented Apr 12, 2021 at 19:54
  • 1
    @Leon I've added an example of this to my answer. Commented Apr 12, 2021 at 20:50

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