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Hi Stefan_K,
Thanks a lot, it did the job.

Hi,
When I latexed the example below I did not get "X" in the outcome of the file. Is there a solution for this?
Thanks a lot for the help.

\documentclass{article}
\usepackage{amsmath,bm}
\usepackage[cp1256]{inputenc}
\usepackage[arabic,english]{babel}
\begin{document}

$\frac{d}{dt}[\bm{r}(t ...

Hi all,
I have a problem and I need help.
I want the section in the appendix appear like this A.1 insted of 1.1.
I attach the file.

Thanks a lot

Hi all,
I have a question, using the section format posted above how do you make colorbox around the section name?

Thanks