[Tex/LaTex] setting text size inside tcolorbox

fontsizetcolorbox

How can I set the size of all the text that appears inside a tcolorbox to a different size? I have tried size=small in the options of the tcolorbox to no effect.

\begin{tcolorbox}[size=small]
some text
\end{tcolorbox}

Best Answer

It can be done by setting a hook at the beginning of the tcolorbox environment with the aid of etoolbox package. See the following:

\documentclass{article}

\usepackage{tcolorbox}
\usepackage{lipsum}
\usepackage{etoolbox}
\AtBeginEnvironment{tcolorbox}{\small}

\begin{document}

\lipsum[2]
\begin{tcolorbox}%[size=small]
\lipsum[2]
\end{tcolorbox}

\end{document}

new solution based on comment

As you mentioned, previous solution makes all boxes' font size small, but with fontupper option you can set font size for upper part of tcolorbox and with fontlower for the lower part.

\documentclass{article}

\usepackage{tcolorbox}
\usepackage{lipsum}

\newtcolorbox{mybox}{fontupper=\footnotesize}

\begin{document}
\begin{tcolorbox}[fontupper=\tiny, fontlower=\Large]
This is the upper part. 
\tcblower
This is the lower part.
\end{tcolorbox}

This is normal size font. 

\begin{mybox}
\lipsum[2]
\end{mybox}

\end{document}

Related Solutions

[Tex/LaTex] Alignment of image in tcolorbox

Adjust the settings according to your needs:

\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage[many]{tcolorbox}
\usepackage{lipsum}
\usetikzlibrary{calc}

\newtcolorbox{mybox}{
  enhanced,
  left=0pt,
  right=0pt,
  top=8pt,
  bottom=8pt,
  colback=white,
  colframe=red,
  width=\textwidth,
  enlarge left by=0mm,
  boxsep=5pt,
  fontupper=\itshape\small,
  arc=4pt,
  outer arc=4pt,
  leftupper=1.5cm,
  overlay={
    \node[anchor=west] 
      at ([xshift=10pt] $ (frame.north west)!0.5!(frame.south west) $ )
       {\includegraphics[width=1cm,height=1cm]{example-image-a}};}
}
\begin{document}
\begin{mybox}
\lipsum[4]
\end{mybox}
\end{document}

enter image description here

Or with a different vertical alignment for the image:

\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage[many]{tcolorbox}
\usepackage{lipsum}

\newtcolorbox{mybox}{
  enhanced,
  left=0pt,
  right=0pt,
  top=8pt,
  bottom=8pt,
  colback=white,
  colframe=red,
  width=\textwidth,
  enlarge left by=0mm,
  boxsep=5pt,
  fontupper=\itshape\small,
  arc=4pt,
  outer arc=4pt,
  leftupper=1.5cm,
  overlay={
    \node[anchor=north west] 
      at ([xshift=10pt,yshift=-.65\baselineskip]frame.north west)
       {\includegraphics[width=1cm,height=1cm]{example-image-a}};}
}
\begin{document}
\begin{mybox}
\lipsum[4]
\end{mybox}
\end{document}

enter image description here

Footnote inside and then outsite tcolorbox

You need to use two different environments: one (new) for footnotes outside and the default for footnotes inside.

\documentclass[10pt,a4paper]{article}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}

\usepackage{tcolorbox}
\usepackage{footnote}

\usepackage{environ}% added  <<<<<<<<<<<<

\NewEnviron{TCBx}{ % footnotes ouside the box
    \begin{savenotes}
        \begin{tcolorbox}
                \BODY   
        \end{tcolorbox}
    \end{savenotes}
}
\begin{document}

        \begin{TCBx}    
            This is text\footnote{First footnote outside the box.} text...  
        \end{TCBx}
        
        \begin{tcolorbox}
            This is text\footnote{footnote inside the box.} bla bla bla
        
            This is text\footnote{again footnote inside the box.} bla bla bla
        \end{tcolorbox}
        
        \begin{TCBx}    
            This is text\footnote{Second footnote outside the box.} text... 
        \end{TCBx}
        
        \begin{TCBx}    
            This is text\footnote{Third footnote outside the box.} text...  
        \end{TCBx}

\end{document}

Best Answer

new solution based on comment

Related Solutions

[Tex/LaTex] Alignment of image in tcolorbox

Footnote inside and then outsite tcolorbox

Related Question