Doc: todo entries output pane

Change-Id: I3ab06225d9effae24d77046febd6b6b798b03f3e
Reviewed-by: Dmitry Savchenko <dmitry.a.sav@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

doc/src/howto/creator-ui.qdoc

@@ -243,10 +243,12 @@
 
        \o  \gui{Compile Output}
 
-       \o  \gui{General Messages}
+       \o  \gui {To-Do Entries}
 
        \o  \gui{Version Control}
 
+       \o  \gui{General Messages}
+
     \endlist
 
     Output panes are available in all \l{Modes}{modes}. Click the name of an
@@ -260,7 +262,8 @@
 
     To open the \gui{General Messages} and \l{Using Version Control Systems}
     {Version Control} panes, select
-    \gui {Window > Output Panes}.
+    \gui {Window > Output Panes}. To display the \gui {To-Do Entries} pane,
+    enable the Todo plugin.
 
     \section2 Issues
 
@@ -333,6 +336,29 @@
 
     \image qtcreator-compile-pane.png
 
+    \section2 To-Do List
+
+    The \gui {To-Do List Entries} pane lists the BUG, FIXME, NOTE, TODO, and
+    WARNING keywords from the current file or from all project files. The
+    keywords are organized into information, warning, and error categories.
+
+    \image qtcreator-todo-pane.png
+
+    To add keywords, select \gui Tools > \gui Options > \gui {To-Do} > \gui Add.
+    Set an icon and a line background color for the keyword. To change the icons
+    and colors set for an existing keyword, select \gui Edit.
+
+    To determine whether the keywords in the whole project or in the current
+    file are displayed by default, select \gui {Scanning scope}.
+
+    The Todo plugin is disabled by default. To enable the plugin, select
+    \gui Help > \gui {About Plugins} > \gui Utilities > \gui Todo and restart
+    \QC.
+
+    In addition, you can open task list files generated by code scanning and
+    analysis tools in the \gui Issues pane. For more information, see
+    \l{Showing Task List Files in Issues Pane}.
+
     \section1 Changing Languages
 
     \QC has been localized into several languages. If the system language is one