\documentclass[a4paper]{article}

\usepackage{amsmath,amssymb}

%%%%%%%%%% XeTeX-specific
\usepackage[itemph]{xetexko-var}
%% ¿µ¹®±Û²Ã
\setmainfont[Mapping=tex-text]{Times New Roman}
\setsansfont[Mapping=tex-text]{Arial}
\setmonofont[Scale=.9]{Courier New}
%% Çѱ۱۲Ã
\setkormainfont(³ª´®¸íÁ¶ Bold)(*){³ª´®¸íÁ¶}
\setkorsansfont(³ª´®°íµñ Bold)(*){³ª´®°íµñ}
\setkormonofont{¸¼Àº °íµñ}
\setmonoscale{.85}

\linespread{1.3}