Adding line numbers in Latex

Here is a sample usage.

usepackage{lineno}

\setpagewiselinenumbers
\modulolinenumbers[1]
\renewcommand\linenumberfont{\normalfont\small}
\setlength\linenumbersep{1.5cm}
\linenumbers

Another way of creating Eps file for using it in Latex

Usually, we use Adobe Illustrator CS4 to get eps file,
but its file size is often large, depending on options we select (especially when using the default option).

To reasonably reduce the file size, we might consider the following steps:

1) Save a given image as pdf file
2) Open the target pdf file using Acrobat Pro, and save it as eps file.
3) Use the eps file to compile latex source.

Of course, there might be an equivalent way of using Adobe Illustrator CS4 only.

[latex] text above equation symbol

using \overset

references
[1] http://www.stack.nl/~jwk/latex/examples/node6.html