diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 30113f1b2..91b4d9875 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -125,7 +125,7 @@ set (UG_IMGS
   images/VHF_controls.png
   images/view-menu.png
   images/wide-graph-controls.png
-
+  images/Windows_Dark.png
 )
 
 find_program (ASCIIDOCTOR_EXECUTABLE NAMES asciidoctor)
diff --git a/doc/user_guide/en/images/Windows_Dark.png b/doc/user_guide/en/images/Windows_Dark.png
new file mode 100644
index 000000000..8f615601f
Binary files /dev/null and b/doc/user_guide/en/images/Windows_Dark.png differ
diff --git a/doc/user_guide/en/new_features.adoc b/doc/user_guide/en/new_features.adoc
index 14a2c576c..e63d8dd07 100644
--- a/doc/user_guide/en/new_features.adoc
+++ b/doc/user_guide/en/new_features.adoc
@@ -83,14 +83,25 @@ overlooked.
 IMPORTANT: *Warnings* about usage that could lead to undesired
 consequences.
 
+=== User Interface in Other Languages
+
+Thanks to Xavi Perez, EA3W, in cooperation with G4WJS, the _WSJT-X_
+user interface is now available the Catalan language.  Spanish will
+follow soon, and other languages when translations are made.  When a
+translated user interface is available for the computer's default
+System Language, it will appear automatically on program startup.
+
 === How You Can Contribute
 
 _WSJT-X_ is part of an open-source project released under the
 {gnu_gpl} (GPLv3). If you have programming or documentation skills or
 would like to contribute to the project in other ways, please make
-your interests known to the development team.  The project's
-source-code repository can be found at {devrepo}, and communication
-among the developers takes place on the email reflector {devmail}.
-Bug reports and suggestions for new features, improvements to the
-_WSJT-X_ User Guide, etc., may be sent there as well.  You must join
-the group before posting to the email list.
+your interests known to the development team.  We especially encourage
+those with translation skills to volunteer their help, either for
+this _User Guide_ or for the program's user interface.
+
+The project's source-code repository can be found at {devrepo}, and
+communication among the developers takes place on the email reflector
+{devmail}.  Bug reports and suggestions for new features, improvements
+to the _WSJT-X_ User Guide, etc., may be sent there as well.  You must
+join the group before posting to the email list.
diff --git a/doc/user_guide/en/platform-dependencies.adoc b/doc/user_guide/en/platform-dependencies.adoc
index 384ec3dda..f47f6173c 100644
--- a/doc/user_guide/en/platform-dependencies.adoc
+++ b/doc/user_guide/en/platform-dependencies.adoc
@@ -3,7 +3,8 @@
 A few _WSJT-X_ features behave differently in Windows, Linux, or OS X,
 or may not be relevant to all operating platforms.
 
-.File locations
+=== File locations
+
 * *Windows*
 
 - *Settings:*               %LOCALAPPDATA%\WSJT-X\WSJT-X.ini
diff --git a/doc/user_guide/en/wsjtx-main.adoc b/doc/user_guide/en/wsjtx-main.adoc
index c20bf4c9c..b04291136 100644
--- a/doc/user_guide/en/wsjtx-main.adoc
+++ b/doc/user_guide/en/wsjtx-main.adoc
@@ -102,6 +102,25 @@ include::settings-colors.adoc[]
 === Advanced
 include::settings-advanced.adoc[]
 
+[[DARK_STYLE]]
+=== Dark Style
+
+An optional *Dark* style is available.  To make it effective you will
+probably want to redefine your color settings.  In Windows or Linux,
+start the program from a command-prompt window using the following
+command, or modify the _WSJT-X_ desktop shortcut accordingly:
+
+ wsjtx --stylesheet :/qdarkstyle/style.qss
+
+In macOS, enter the following command from a terminal:
+
+ open /Applications/wsjtx.app --args -stylesheet :/qdarkstyle/style.qss
+
+Depending on your operating system, the main _WSJT-X_ window will look
+something like this:
+
+image::Windows_Dark.png[align="center"]
+
 [[TRANSCEIVER]]
 == Transceiver Setup
 include::transceiver-setup.adoc[]