How to increase the font size and make a boldface of the whole symbol given above in mathmode in Latex ?
Using \bm
command from bm
package and \scalebox
from graphicx
package.
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.
Another alternative without 'scalebox'.
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}
\sigma
? And which part do you want to increase the font size of? Please be more specific... – Werner Nov 26 '13 at 6:21