They need to be available on your system in order to use these environments.
\end_layout
+\begin_layout Subsection
+
+\change_inserted 564990737 1671383236
+
+\lang american
+\begin_inset CommandInset label
+LatexCommand label
+name "subsec:Extra-font-sizes"
+
+\end_inset
+
+Extra font sizes
+\end_layout
+
+\begin_layout Standard
+
+\change_inserted 564990737 1671383236
+
+\lang american
+The “Extra font sizes” collection provides the document classes
+\family sans
+article
+\begin_inset space \thinspace{}
+\end_inset
+
+(with extra font sizes)
+\family default
+,
+\family sans
+book
+\begin_inset space \thinspace{}
+\end_inset
+
+(with extra font sizes)
+\family default
+,
+\family sans
+letter
+\begin_inset space \thinspace{}
+\end_inset
+
+(with extra font sizes)
+\family default
+ and
+\family sans
+report
+\begin_inset space \thinspace{}
+\end_inset
+
+(with extra font sizes)
+\family default
+ which use the
+\family typewriter
+article.cls
+\family default
+,
+\family typewriter
+book.cls
+\family default
+,
+\family typewriter
+letter.cls
+\family default
+ and
+\family typewriter
+report.cls
+\family default
+ document classes respectively but offer the additional
+\family sans
+\bar under
+B
+\bar default
+ase
+\begin_inset space ~
+\end_inset
+
+Size
+\family default
+ options 8, 9, 14, 17 and 20 in the
+\family sans
+\bar under
+D
+\bar default
+ocument\SpecialChar menuseparator
+
+\bar under
+S
+\bar default
+ettings\SpecialChar menuseparator
+Fonts
+\family default
+ dialog.
+\end_layout
+
+\begin_layout Subsection
+
+\change_inserted 564990737 1671383236
+
+\lang american
+Hebrew
+\end_layout
+
+\begin_layout Standard
+
+\change_inserted 564990737 1671383236
+
+\lang american
+The document classes
+\family sans
+article
+\begin_inset space \thinspace{}
+\end_inset
+
+(Hebrew)
+\family default
+ and
+\family sans
+letter
+\begin_inset space \thinspace{}
+\end_inset
+
+(Hebrew)
+\family default
+ use the
+\family typewriter
+article.cl
+\family sans
+s
+\family default
+ and
+\family typewriter
+letter.cls
+\family default
+ document classes to facilitate the use of Hebrew in \SpecialChar LyX
+.
+\end_layout
+
+\begin_layout Subsection
+
+\change_inserted 564990737 1671383236
+
+\lang american
+\begin_inset CommandInset label
+LatexCommand label
+name "subsec:Japanese"
+
+\end_inset
+
+Japanese
+\end_layout
+
+\begin_layout Standard
+
+\change_inserted 564990737 1671383236
+
+\lang american
+The document classes
+\family sans
+article
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese JS Class)
+\family default
+,
+\family sans
+ article
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese Standard Class Vertical Writing)
+\family default
+,
+\family sans
+article
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese Standard Class)
+\family default
+,
+\family sans
+book
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese JS Class)
+\family default
+,
+\family sans
+ book
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese Standard Class Vertical Writing)
+\family default
+,
+\family sans
+book
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese Standard Class)
+\family default
+,
+\family sans
+report
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese Vertical Writing)
+\family default
+ and
+\family sans
+report
+\begin_inset space \thinspace{}
+\end_inset
+
+(Japanese Standard Class)
+\family default
+ provide document classes for the Japanese language.
+\end_layout
+
\begin_layout Subsection
Koma-Script
\end_layout