diff --git a/lib/doc/EmbeddedObjects.lyx b/lib/doc/EmbeddedObjects.lyx
index 12f9468b10..e7189cdba8 100644
--- a/lib/doc/EmbeddedObjects.lyx
+++ b/lib/doc/EmbeddedObjects.lyx
@@ -76,10 +76,6 @@
  \let\figure\MyFigure
  \let\endfigure\MyEndfigure}
 
-% use the marginnote package for margin notes
-\usepackage{marginnote}
-\let\marginpar\marginnote
-
 % enables calculation of values,
 \usepackage{calc}
 
@@ -107,9 +103,6 @@
 \definecolor{darkgreen}{cmyk}{0.5, 0, 1, 0.5}
 \definecolor{lightgrey}{gray}{0.8}
 
-% used for tables with dashed lines
-\usepackage{arydshln}
-
 % used for multirows
 \usepackage{multirow}
 %\renewcommand{\multirowsetup}{\centering}
@@ -158,6 +151,27 @@
 % redefine the greyed out note
 \renewenvironment{lyxgreyedout}
  {\textcolor{blue}\bgroup}{\egroup}
+
+% ------------------------------------
+% used to check for needed LaTeX packages
+\usepackage{ifthen}
+
+% check for package arydshln
+% used for tables with dashed lines
+\newboolean{arydshln}
+\IfFileExists{arydshln.sty}
+ {\usepackage{arydshln}
+  \setboolean{arydshln}{true}}
+ {\setboolean{arydshln}{false}}
+
+% check for package marginnote
+% used for margin notes
+\newboolean{marginnote}
+\IfFileExists{marginnote.sty}
+ {\usepackage{marginnote}
+  \let\marginpar\marginnote
+  \setboolean{marginnote}{true}}
+ {\setboolean{marginnote}{false}}
 \end_preamble
 \options fleqn,liststotoc,bibtotoc,idxtotoc,BCOR7.5mm,titlepage
 \language english
@@ -246,7 +260,7 @@ status collapsed
 status collapsed
 
 \begin_layout Standard
-original author: Uwe Stöhr <uwestoehr@web.de>
+original author: Uwe Stöhr
 \end_layout
 
 \end_inset
@@ -275,19 +289,18 @@ Version 1.5.0-
 status open
 
 \begin_layout Standard
-To export this document to PDF, PS, or DVI the LaTeX-packages 
+To export all parts of this document to PDF, PS, or DVI the LaTeX-packages
+ 
 \series bold
 arydshln
 \series default
-, 
+ and 
 \series bold
 marginnote
-\series default
-, and 
-\series bold
-prettyref
 \series default
  must be installed.
+ If they are not installed you can export the document anyway but the sections
+ where the packages are required won't appear in the output.
 \end_layout
 
 \begin_layout Standard
@@ -16860,6 +16873,37 @@ name "Table Customization ! Dashed Lines"
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+ifarydshln
+\end_layout
+
+\end_inset
+
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+The following section will only be displayed when you have the LaTeX-package
+ 
+\series bold
+arydshln
+\series default
+ is installed.
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Standard
@@ -17334,6 +17378,60 @@ reference "sec:Colored-Tables"
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+else
+\end_layout
+
+\end_inset
+
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+The following will be displayed when the LaTeX-package 
+\series bold
+arydshln
+\series default
+ is not installed:
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+You need to install the package 
+\series bold
+arydshln
+\series default
+ to see the contents of this section in the output.
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+fi
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Chapter
@@ -22789,6 +22887,44 @@ Note:
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset VSpace bigskip
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+ifmarginnote
+\end_layout
+
+\end_inset
+
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+The following section will only be displayed when you have the LaTeX-package
+ 
+\series bold
+marginnote
+\series default
+ is installed.
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Standard
@@ -23248,7 +23384,7 @@ myMarginpar{#1}}
 \series default
 
 \begin_inset Note Note
-status open
+status collapsed
 
 \begin_layout Standard
 The margin note format is changed only for this example.
@@ -23257,6 +23393,60 @@ The margin note format is changed only for this example.
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+else
+\end_layout
+
+\end_inset
+
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+The following will be displayed when the LaTeX-package 
+\series bold
+marginnote
+\series default
+ is not installed:
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+You need to install the LaTeX-package 
+\series bold
+marginnote
+\series default
+ to see the following part of this section in the output.
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+fi
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Chapter
diff --git a/lib/doc/es_EmbeddedObjects.lyx b/lib/doc/es_EmbeddedObjects.lyx
index e93b66a36f..02f8e6d980 100644
--- a/lib/doc/es_EmbeddedObjects.lyx
+++ b/lib/doc/es_EmbeddedObjects.lyx
@@ -29,10 +29,6 @@
  \let\figure\MyFigure
  \let\endfigure\MyEndfigure}
 
-% use the marginnote package for margin notes
-\usepackage{marginnote}
-\let\marginpar\marginnote
-
 % enables calculation of values,
 \usepackage{calc}
 
@@ -97,9 +93,6 @@
 \definecolor{verdeoscuro}{cmyk}{0.5, 0, 1, 0.5}
 \definecolor{grisclaro}{gray}{0.8}
 
-% used for tables with dashed lines
-\usepackage{arydshln}
-
 % used for multirows
 \usepackage{multirow}
 %\renewcommand{\multirowsetup}{\centering}
@@ -158,6 +151,27 @@
 % redefine the greyed out note
 \renewenvironment{lyxgreyedout}
  {\textcolor{blue}\bgroup}{\egroup}
+
+% ------------------------------------
+% used to check for needed LaTeX packages
+\usepackage{ifthen}
+
+% check for package arydshln
+% used for tables with dashed lines
+\newboolean{arydshln}
+\IfFileExists{arydshln.sty}
+ {\usepackage{arydshln}
+  \setboolean{arydshln}{true}}
+ {\setboolean{arydshln}{false}}
+
+% check for package marginnote
+% used for margin notes
+\newboolean{marginnote}
+\IfFileExists{marginnote.sty}
+ {\usepackage{marginnote}
+  \let\marginpar\marginnote
+  \setboolean{marginnote}{true}}
+ {\setboolean{marginnote}{false}}
 \end_preamble
 \options fleqn,liststotoc,bibtotoc,idxtotoc,BCOR7.5mm,titlepage
 \language spanish
@@ -246,7 +260,7 @@ status collapsed
 status collapsed
 
 \begin_layout Standard
-autor original: Uwe Stöhr <uwestoehr@web.de>
+autor original: Uwe Stöhr
 \end_layout
 
 \end_inset
@@ -287,19 +301,18 @@ status open
 \begin_layout Standard
 
 \lang english
-To export this document to PDF, PS, or DVI the LaTeX-packages 
+To export all parts of this document to PDF, PS, or DVI the LaTeX-packages
+ 
 \series bold
 arydshln
 \series default
-, 
+ and 
 \series bold
 marginnote
-\series default
-, and 
-\series bold
-prettyref
 \series default
  must be installed.
+ If they are not installed you can export the document anyway but the sections
+ where the packages are required won't appear in the output.
 \end_layout
 
 \begin_layout Standard
@@ -16659,6 +16672,39 @@ name "Personalización de Tablas ! Líneas de Trazos"
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+ifarydshln
+\end_layout
+
+\end_inset
+
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+
+\lang english
+The following section will only be displayed when you have the LaTeX-package
+ 
+\series bold
+arydshln
+\series default
+ is installed.
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Standard
@@ -17117,6 +17163,64 @@ reference "sec:Tablas-Coloreadas"
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+else
+\end_layout
+
+\end_inset
+
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+
+\lang english
+The following will be displayed when the LaTeX-package 
+\series bold
+arydshln
+\series default
+ is not installed:
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+
+\lang english
+You need to install the package 
+\series bold
+arydshln
+\series default
+ to see the contents of this section in the output.
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+fi
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Chapter
@@ -22184,6 +22288,46 @@ Nota:
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset VSpace bigskip
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+ifmarginnote
+\end_layout
+
+\end_inset
+
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+
+\lang english
+The following section will only be displayed when you have the LaTeX-package
+ 
+\series bold
+marginnote
+\series default
+ is installed.
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Standard
@@ -22462,21 +22606,15 @@ key "marginnote"
 El diseño de las notas al margen puede ser redefinido.
  Por ejemplo, para crear una cabecera para todas las notas con el texto
  
-\begin_inset Quotes erd
-\end_inset
-
-
-\family sans
 \series bold
 \bar under
+¡
+\family sans
 Atención
 \family default
+!
 \series default
 \bar default
-
-\begin_inset Quotes eld
-\end_inset
-
 , subrayado, sans-serif en negrita, añade lo siguiente en el preámbulo:
 \end_layout
 
@@ -22655,6 +22793,66 @@ El formato de la nota al margen se ha cambiado solo para este ejemplo.
 \end_inset
 
 
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+else
+\end_layout
+
+\end_inset
+
+
+\lang english
+
+\begin_inset Note Note
+status open
+
+\begin_layout Standard
+
+\lang english
+The following will be displayed when the LaTeX-package 
+\series bold
+marginnote
+\series default
+ is not installed:
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+
+\lang english
+You need to install the LaTeX-package 
+\series bold
+marginnote
+\series default
+ to see the following part of this section in the output.
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+fi
+\end_layout
+
+\end_inset
+
+
 \end_layout
 
 \begin_layout Chapter