diff --git a/CHANGELOG.md b/CHANGELOG.md
index 213ae7a..551533c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 * Add new Image Visualizer.
     - View RGB888 and RGBA8888 images.
 * Assembly Tab can show source lines along with assembly.
+* Add help for the main window's tab bar.
 
 ## [1.12] - 2022-10-22
 
diff --git a/src/SeerMainWindow.cpp b/src/SeerMainWindow.cpp
index e881268..3b04cdc 100644
--- a/src/SeerMainWindow.cpp
+++ b/src/SeerMainWindow.cpp
@@ -3,10 +3,12 @@
 #include "SeerConfigDialog.h"
 #include "SeerArgumentsDialog.h"
 #include "SeerAboutDialog.h"
+#include "SeerHelpPageWidget.h"
 #include "SeerUtl.h"
 #include <QtWidgets/QMessageBox>
 #include <QtWidgets/QMenu>
 #include <QtWidgets/QStyleFactory>
+#include <QtWidgets/QToolButton>
 #include <QtGui/QKeySequence>
 #include <QtGui/QPalette>
 #include <QtCore/QCoreApplication>
@@ -43,6 +45,13 @@ SeerMainWindow::SeerMainWindow(QWidget* parent) : QMainWindow(parent) {
 
     toolBar->addWidget(_progressIndicator);
 
+    // Add help button.
+    QToolButton* helpToolButton = new QToolButton(this);
+    helpToolButton->setIcon(QIcon(":/seer/resources/RelaxLightIcons/help-about.svg"));
+    helpToolButton->setToolTip("Help on source/symbol/library information.");
+
+    toolBar->addWidget(helpToolButton);
+
     // Set up Styles menu.
     _styleMenuActionGroup = new QActionGroup(this);
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
@@ -155,6 +164,8 @@ SeerMainWindow::SeerMainWindow(QWidget* parent) : QMainWindow(parent) {
     QObject::connect(gdbWidget,                         &SeerGdbWidget::changeWindowTitle,      this,           &SeerMainWindow::handleChangeWindowTitle);
     QObject::connect(qApp,                              &QApplication::aboutToQuit,             gdbWidget,      &SeerGdbWidget::handleGdbShutdown);
 
+    QObject::connect(helpToolButton,                    &QToolButton::clicked,                  this,           &SeerMainWindow::handleHelpToolButtonClicked);
+
     handleRecordSettingsChanged();
 
     // Restore window settings.
@@ -910,6 +921,14 @@ void SeerMainWindow::handleChangeWindowTitle (QString title) {
     }
 }
 
+void SeerMainWindow::handleHelpToolButtonClicked () {
+
+    SeerHelpPageWidget* help = new SeerHelpPageWidget;
+    help->loadFile(":/seer/resources/help/MainWindow.md");
+    help->show();
+}
+
+
 void SeerMainWindow::writeSettings() {
 
     QSettings settings;
diff --git a/src/SeerMainWindow.h b/src/SeerMainWindow.h
index ca8ad5c..d2c3e71 100644
--- a/src/SeerMainWindow.h
+++ b/src/SeerMainWindow.h
@@ -72,6 +72,7 @@ class SeerMainWindow : public QMainWindow, protected Ui::SeerMainWindowForm {
         void                        handleRunStatusChanged              (SeerRunStatusIndicator::RunStatus status);
         void                        handleRecordSettingsChanged         ();
         void                        handleChangeWindowTitle             (QString title);
+        void                        handleHelpToolButtonClicked         ();
         void                        handleRunExecutable                 ();
         void                        handleStartExecutable               ();
         void                        handleStyleMenuChanged              ();
diff --git a/src/resource.qrc b/src/resource.qrc
index 6511ed5..a140cea 100644
--- a/src/resource.qrc
+++ b/src/resource.qrc
@@ -64,6 +64,7 @@
     <file>resources/help/SourceSymbolLibraryInfoBrowser.md</file>
     <file>resources/help/CodeManager.md</file>
     <file>resources/help/BreakpointGdbSeerManager.md</file>
+    <file>resources/help/MainWindow.md</file>
   </qresource>
 </RCC>
 
diff --git a/src/resources/help/MainWindow.md b/src/resources/help/MainWindow.md
new file mode 100644
index 0000000..38d43a4
--- /dev/null
+++ b/src/resources/help/MainWindow.md
@@ -0,0 +1,35 @@
+## Seer Main Window
+
+### Main Tool Bar
+
+The main toolbar has buttons for access to Seers's common functions. Most of these buttons also have hotkeys
+assigned to them. These can be configured with "Settings->Configure->Keys".
+
+The buttons are arranged in groups.
+
+* Restarting the debug session.
+
+    * Run - Restart the program. Only stop at any previously set breakpoints.
+    * Start - Restart the program. Stop in main().
+
+* Stepping.
+
+    * Continue - Continue the program until it encounters the next breakpoint or it ends.
+    * Next - Execute the next line. Step over if it's a function.
+    * Step - Exectue the next line. Step into it it's a function.
+    * Finish - Finish the current function. Honor any breakpoints.
+
+* Instruction recording. Use gdb's instruction and playback feature.
+
+    * Record - Start the record mode.
+    * Direction - Set playback mode. Forward or reverse. The direction affects the Stepping functions.
+
+* Program interruption. Interrupt the running program or send it a specific signal.
+
+* Visualizers
+
+    * Memory - Visualize a region of memory in a 'hex viewer'.
+    * Array - Visualizer a region of memory as arrays. A table and 2D plot.
+    * Struct - Visualize a region of memory as a nested C/C++ structure.
+    * Image - Visializer a region of memory as a RGB or RGBA image.
+