diff --git a/documentation/current/eiffelstudio/eiffelstudio-how-tos/running-and-debugging/tracing.wiki b/documentation/current/eiffelstudio/eiffelstudio-how-tos/running-and-debugging/tracing.wiki
index 20d2922a..62275dd7 100644
--- a/documentation/current/eiffelstudio/eiffelstudio-how-tos/running-and-debugging/tracing.wiki
+++ b/documentation/current/eiffelstudio/eiffelstudio-how-tos/running-and-debugging/tracing.wiki
@@ -14,7 +14,7 @@ The '''tracing facility''' allows you to see a structured log of the flow of con
 You can make tracing usable for a particular cluster by setting the '''Trace''' setting to '''True''' in your project settings for a particular cluster.
 
 To do this:
-* Open the [[Group Options|Project Settings]]  dialog. 
+* Open the [[Group Options|Project Settings]] dialog. 
 * Under '''Clusters''' select the cluster you want to see traced. 
 * Set the value of '''Trace''' to '''True'''.
 * Click '''Apply''' or '''OK'''. 
diff --git a/documentation/current/platform-specifics/microsoft-windows/eiffelribbon/eiffelribbon-design-tool.wiki b/documentation/current/platform-specifics/microsoft-windows/eiffelribbon/eiffelribbon-design-tool.wiki
index 524aabe8..b611e71d 100644
--- a/documentation/current/platform-specifics/microsoft-windows/eiffelribbon/eiffelribbon-design-tool.wiki
+++ b/documentation/current/platform-specifics/microsoft-windows/eiffelribbon/eiffelribbon-design-tool.wiki
@@ -63,9 +63,14 @@ Once a custom size definition has been designed, it can be named, saved, and use
 Figure 5. The Size Definition Editor naming field and '''Save''' button.
 
 
+When you generate code which uses a custom size definition, the EiffelRibbon Design Tool generates the (XML) representation for your size definition and then invoke the Microsoft Ribbon Framework's User Interface Command Compiler (UICC.exe) to validate the generated size definition code. This process can result in [http://msdn.microsoft.com/en-us/library/windows/desktop/dd316918(v=VS.85).aspx certain types of errors]. 
+
+User Interface Command Compiler errors will appear in the Ouput pane of the EiffelRibbon Design Tool.
+
+
 ==Scaling policy==
 
-The notion of adaptive layout includes the ability to specify preferred sizes for elements of a group and a scaling policy that can influence how the group reacts to resizing. More detail on size definition and scaling policy is available in Microsoft's '''[http://msdn.microsoft.com/en-us/library/windows/desktop/dd316927(v=vs.85).aspx ribbon documentation]'''. 
+The notion of adaptive layout includes the ability to specify preferred sizes for elements of a group and a scaling policy that can influence how the group reacts to resizing. More detail on size definition and scaling policy is available in Microsoft's [http://msdn.microsoft.com/en-us/library/windows/desktop/dd316927(v=vs.85).aspx ribbon documentation]. 
 
 The EiffelRibbon tool allows you to specify ideal sizes and scale policy for a groups elements through the '''Ideal sizes''' radio buttons and the '''Scale''' checkboxes, as shown in Figure 6 below.