+ pane, LyX will enable the
+\begin_inset Quotes eld
+\end_inset
+
+Validate
+\begin_inset Quotes erd
+\end_inset
+
+ button at the bottom.
+ Clicking this button will cause LyX to determine whether what you have
+ entered is valid layout information for the chosen format.
+ LyX will report the result but, unfortunately, will not tell you what errors
+ there might have been.
+ These will be written to the terminal, however, if LyX is started from
+ a terminal.
+ You will not be permitted to save your local layout until you have entered
+ something valid.
+\end_layout
+
+\begin_layout Standard
+The warnings at the end of the previous section apply here, too.
+ Do not play with local layout while you are actually working, especially
+ if you have not saved your document.
+ That said, using local layout with a test document can be a very convenient
+ way to try out layout ideas, or even to start developing a module.
+\end_layout
+
+\begin_layout Subsection
+Layout for
+\begin_inset Flex MenuItem
+status collapsed
+
+\begin_layout Plain Layout
+.sty
+\end_layout
+
+\end_inset
+
+ files
+\end_layout
+
+\begin_layout Standard
+There are two situations you are likely to encounter when wanting to support
+ a new LaTeX document class, involving style (
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+.sty
+\end_layout
+
+\end_inset
+
+) files and LaTeX2e class (
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+.cls
+\end_layout
+
+\end_inset
+
+) .