Pushing down the rule of heading

Question

Writing a book of probability in arabic, and using the titleps package for the headpage, I obtain some non-beautiful result when there is in the headings some "long-down" letters like the arabic letter ع , for example, where the rule touch some letters. So I want to push down the rule of heading with 1pt or 2, to obtain a best heading. How I can I do this? I give an example to watch you the effect..

I use titleps and this is my page style..

\newpagestyle{Mybookstyle}{
  \setheadrule{.1pt}% Header rule
  \sethead
  [\thepage\hspace*{14pt}\thetitle]% even left
    []% even centre
    [\sectiontitle \hspace*{5pt} .\thesection]% even right
{الباب          
    \arabic{chapter}. 
    \chaptertitle}% odd left
    {}% odd centre
    {\thepage}% odd right
} 

Answer 1

Add this in the definition of Mybookstyle:

\renewcommand{\makeheadrule}{\rule[-0.4\baselineskip]{\linewidth}{0.1pt}}%

You can remove \setheadrule{.1pt} since this is incorporated in the above command. The default optional argument to \rule is 0.3\baselineskip, and you can change it to whatever you want.

You can define as many page styles as you please and use them in the document (of course at appropriate places). Here is an explicit example: \documentclass[a4paper,12pt,twoside,openany]{book}% \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage{erewhon} \usepackage{xcolor} \usepackage[pagestyles, clearempty]{titlesec}

 \newpagestyle{Mybookstyle}{%
\renewcommand{\makeheadrule}{\rule[-0.8\baselineskip]{\linewidth}{0.1pt}}%
 \sethead
 [\thepage]% even left
 []% even centre
 [\sectiontitle\enspace\thesection]% even right
 { \arabic{chapter}.\enspace\chaptertitle}% odd left
 {}% odd centre
 {\thepage}% odd right
 }%
 \newpagestyle{Otherbookstyle}{%
\renewcommand{\makeheadrule}{\rule[-0.8\baselineskip]{\linewidth}{0.1pt}}
 \sethead
 [\thepage]% even left
 []% even centre
 [\color{red}\sectiontitle\enspace\thesection]% even right
 { \arabic{chapter}.\enspace\chaptertitle}% odd left
 {}% odd centre
 {\thepage}% odd right
 }%
\pagestyle{Mybookstyle}

\begin{document}

\chapter{Les lois discrètes}
\newpage
\section{Définition et propriété}
\newpage
\section{Propriété et Définition}
\newpage\pagestyle{Otherbookstyle}
\section{Exercises}

\end{document}