Take the 2-minute tour ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

Taking from the PGF manual,

\begin{tikzpicture}
  \draw [help lines] (0,0) grid (3,3);
  \coordinate (a) at (rnd,rnd);
  \coordinate (b) at (3-rnd,3-rnd);
  \draw (a) -- (b);
  \node (c) at (1,2) {x};
  \draw let \p1 = ($ (a)!(c)!(b) - (c) $),
            \n1 = {veclen(\x1,\y1)}
        in circle [at=(c), radius=\n1];
\end{tikzpicture}

I'd like to increase the size of x. The problem is that I have multiple circles in the same diagram. Some of them require a larger sized font, while others are okay at default. How do I do this?

share|improve this question
    
how about \node[scale=3] at (1,2) {x} (choose the number appropriately) –  cmhughes Apr 5 '13 at 17:38
    
@cmhughes: why not post an answere? ;) –  ralfix Apr 5 '13 at 19:03
add comment

2 Answers

up vote 13 down vote accepted

You can change the font size inside a tikZ node like you do it in normal LaTeX – use one of these:

\tiny
\scriptsize
\footnotesize
\small
\normalsize
\large
\Large
\LARGE
\huge
\Huge

e.g.

\node (c) at (1,2) {\large x};

or

\node (c) at (1,2) {\large $x$}; %note the \large *outside* the inline math

Edit: To change font size inside math mode, LaTeX provides the following commands:

\displaystyle
\textstyle
\scriptstyle
\scriptscriptstyle

Using scaling algorithms provided by tikZ/pgf (e.g. scale=...) scales "the entire character", so it may look ugly if you use too much scaling. If you set the font sizes with the above commands, LaTeX selects different symbols for the different font sizes. This ensures the fonts are readable and have enough "details". If you want a more extreme scaling, use the scale=3.0 option for the node.

share|improve this answer
    
it says it's invalid with math mode? –  AlanH Apr 5 '13 at 17:53
    
Maybe worth pointing out the font key which could be of help in this case :) –  Claudio Fiandrino Apr 5 '13 at 17:56
    
@ralfix sorry i didn't mention it. it's too early in the morning for me. bah! –  AlanH Apr 5 '13 at 18:02
    
@ClaudioFiandrino: Do you mean the scale option? –  ralfix Apr 5 '13 at 18:11
3  
@Qrrbrbirlbel: you're right... what I wanted to say was that \node (c) at (1,2) {\large x}; is equivalent to \node[font=\large] (c) at (1,2) {x}; –  Claudio Fiandrino Apr 5 '13 at 19:15
show 1 more comment

Set a new style so that you can use it later.

For example:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{relsize}

\tikzset{fontscale/.style = {font=\relsize{#1}}
    }

\begin{document}
\begin{tikzpicture}
  \draw [help lines] (0,0) grid (3,3);
  \coordinate (a) at (rnd,rnd);
  \coordinate (b) at (3-rnd,3-rnd);
  \draw (a) -- (b);
  \node (c) at (1,2) [fontscale=4] {x};
  \draw let \p1 = ($ (a)!(c)!(b) - (c) $),
            \n1 = {veclen(\x1,\y1)}
        in circle [at=(c), radius=\n1];
\end{tikzpicture}
\end{document
share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.