2

enter image description here

How to increase the font size and make a boldface of the whole symbol given above in mathmode in Latex ?

  • The whole thing? Or just \sigma? And which part do you want to increase the font size of? Please be more specific... – Werner Nov 26 '13 at 6:21
  • 1
    Would this help? tex.stackexchange.com/q/595/34618 – Jesse Nov 26 '13 at 6:27
  • @Werner I need for the whole thing. Edited my question. – Suman Nov 26 '13 at 6:30
3

Using \bm command from bm package and \scalebox from graphicx package.

enter image description here

Code:

\documentclass{article}
\usepackage{bm,graphicx}

\begin{document}
\centering

Normal
\[\sigma_{E_{1}}^{(l)}\]

\bigskip

Bold
\[\bm{\sigma_{E_{1}}^{(l)}}\]

\bigskip

Bold and bigger
\[\scalebox{2}{\ensuremath{\bm{\sigma_{E_{1}}^{(l)}}}}\]

\end{document} 

The latter can be used outside math mode, as well. Adjust the factor 2 to meet your needs.

1

Another alternative without 'scalebox'.

enter image description here

Code

\documentclass{article}
\usepackage{amsmath,bm}
\begin{document}

Normal
\[
\sigma^{(l)}_{E_1}
\]

Bold and Huge size
\[
\Huge
\bm{
\sigma^{(l)}_{E_1}}
\]

Bold and scripsize
\[
\scriptsize
\bm{
\sigma^{(l)}_{E_1}}
\]
\end{document}

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