# cannot see bold and italic char in xelatex [closed]

I am writing a Persian article using Xelatex typesetting and the xepersian package. My problem is that I cannot see characters get bold or italic using textbf and textit respectively. This is my sample document:

\documentclass{article}
\usepackage{fontspec}
\usepackage{xepersian}
\renewcommand{\baselinestretch}{2}
\begin{document}
\section{مقدمه}
\subsection{فرمول بندی مساله}
در این بخش به فرمول بندی مدل زمان -‍ پیوسته ی انتشار برای داده ی مشخص و سپس‌،  راست نمایی آن پرداخته می شود.
\subsubsection{داده ی مساله }
در این پایان نامه، چندین موج انتشار برروی تعداد ثابتی از
\textbf{\textit{N}}

گره در نظر گرفته شده است.

\end{document}


what shall I do?

## closed as off-topic by user36296, Bobyandbob, Mensch, Stefan Pinnow, Phelype OleinikApr 14 '18 at 17:45

• This question does not fall within the scope of TeX, LaTeX or related typesetting systems as defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

• Welcome to TeX.SE. Which font do you use? (If I try to run your code, I get an error message, "You have not specified any font for the main Persian text".) – Mico Apr 8 '16 at 14:56
• @Mico thanks. I did not mention any font in my script. By the way, I did not use fontspec applications in my code, thus u can omit it. – anahita Apr 8 '16 at 15:05
• @Mico I am compiling it with Texworks. – anahita Apr 8 '16 at 15:06
• the defult font in Texworks is MS Shell Dlg 2 – anahita Apr 8 '16 at 15:09
• I'm voting to close this question as solved in comments – user36296 Apr 14 '18 at 16:47