diff --git a/src/dialog/vsettingsdialog.cpp b/src/dialog/vsettingsdialog.cpp
index 3d12ed50..5191f219 100644
--- a/src/dialog/vsettingsdialog.cpp
+++ b/src/dialog/vsettingsdialog.cpp
@@ -603,28 +603,34 @@ VMarkdownTab::VMarkdownTab(QWidget *p_parent)
     m_openModeCombo->addItem(tr("Read Mode"), (int)OpenFileMode::Read);
     m_openModeCombo->addItem(tr("Edit Mode"), (int)OpenFileMode::Edit);
 
-    QLabel *openModeLabel = new QLabel(tr("Note open mode:"));
-    openModeLabel->setToolTip(m_openModeCombo->toolTip());
-
     // Heading sequence.
-    m_headingSequence = new QCheckBox(tr("Heading sequence"));
-    m_headingSequence->setToolTip(tr("Enable auto sequence for all headings (in the form like 1.2.3.4.)"));
-    m_headingSequenceCombo = new QComboBox();
-    m_headingSequenceCombo->setToolTip(tr("Base level to start heading sequence"));
-    m_headingSequenceCombo->addItem(tr("1"), 1);
-    m_headingSequenceCombo->addItem(tr("2"), 2);
-    m_headingSequenceCombo->addItem(tr("3"), 3);
-    m_headingSequenceCombo->addItem(tr("4"), 4);
-    m_headingSequenceCombo->addItem(tr("5"), 5);
-    m_headingSequenceCombo->addItem(tr("6"), 6);
-    m_headingSequenceCombo->setEnabled(false);
-    connect(m_headingSequence, &QCheckBox::stateChanged,
-            this, [this](int p_state){
-                this->m_headingSequenceCombo->setEnabled(p_state == Qt::Checked);
+    m_headingSequenceTypeCombo = new QComboBox();
+    m_headingSequenceTypeCombo->setToolTip(tr("Enable auto sequence for all headings (in the form like 1.2.3.4.)"));
+    m_headingSequenceTypeCombo->addItem(tr("Disabled"), (int)HeadingSequenceType::Disabled);
+    m_headingSequenceTypeCombo->addItem(tr("Enabled"), (int)HeadingSequenceType::Enabled);
+    m_headingSequenceTypeCombo->addItem(tr("Enabled for notes only"), (int)HeadingSequenceType::EnabledNoteOnly);
+
+    m_headingSequenceLevelCombo = new QComboBox();
+    m_headingSequenceLevelCombo->setToolTip(tr("Base level to start heading sequence"));
+    m_headingSequenceLevelCombo->addItem(tr("1"), 1);
+    m_headingSequenceLevelCombo->addItem(tr("2"), 2);
+    m_headingSequenceLevelCombo->addItem(tr("3"), 3);
+    m_headingSequenceLevelCombo->addItem(tr("4"), 4);
+    m_headingSequenceLevelCombo->addItem(tr("5"), 5);
+    m_headingSequenceLevelCombo->addItem(tr("6"), 6);
+    m_headingSequenceLevelCombo->setEnabled(false);
+
+    connect(m_headingSequenceTypeCombo, static_cast<void(QComboBox::*)(int)>(&QComboBox::activated),
+            this, [this](int p_index){
+                if (p_index > -1) {
+                    HeadingSequenceType type = (HeadingSequenceType)m_headingSequenceTypeCombo->itemData(p_index).toInt();
+                    m_headingSequenceLevelCombo->setEnabled(type != HeadingSequenceType::Disabled);
+                }
             });
+
     QHBoxLayout *headingSequenceLayout = new QHBoxLayout();
-    headingSequenceLayout->addWidget(m_headingSequence);
-    headingSequenceLayout->addWidget(m_headingSequenceCombo);
+    headingSequenceLayout->addWidget(m_headingSequenceTypeCombo);
+    headingSequenceLayout->addWidget(m_headingSequenceLevelCombo);
 
     // Web Zoom Factor.
     m_customWebZoom = new QCheckBox(tr("Custom Web zoom factor"), this);
@@ -652,8 +658,8 @@ VMarkdownTab::VMarkdownTab(QWidget *p_parent)
     colorColumnLabel->setToolTip(m_colorColumnEdit->toolTip());
 
     QFormLayout *mainLayout = new QFormLayout();
-    mainLayout->addRow(openModeLabel, m_openModeCombo);
-    mainLayout->addRow(headingSequenceLayout);
+    mainLayout->addRow(tr("Note open mode:"), m_openModeCombo);
+    mainLayout->addRow(tr("Heading sequence:"), headingSequenceLayout);
     mainLayout->addRow(zoomFactorLayout);
     mainLayout->addRow(colorColumnLabel, m_colorColumnEdit);
 
@@ -727,21 +733,28 @@ bool VMarkdownTab::saveOpenMode()
 
 bool VMarkdownTab::loadHeadingSequence()
 {
-    bool enabled = g_config->getEnableHeadingSequence();
+    HeadingSequenceType type = g_config->getHeadingSequenceType();
     int level = g_config->getHeadingSequenceBaseLevel();
     if (level < 1 || level > 6) {
         level = 1;
     }
 
-    m_headingSequence->setChecked(enabled);
-    m_headingSequenceCombo->setCurrentIndex(level - 1);
+    int idx = m_headingSequenceTypeCombo->findData((int)type);
+    Q_ASSERT(idx > -1);
+    m_headingSequenceTypeCombo->setCurrentIndex(idx);
+    m_headingSequenceLevelCombo->setCurrentIndex(level - 1);
+    m_headingSequenceLevelCombo->setEnabled(type != HeadingSequenceType::Disabled);
+
     return true;
 }
 
 bool VMarkdownTab::saveHeadingSequence()
 {
-    g_config->setEnableHeadingSequence(m_headingSequence->isChecked());
-    g_config->setHeadingSequenceBaseLevel(m_headingSequenceCombo->currentData().toInt());
+    QVariant typeData = m_headingSequenceTypeCombo->currentData();
+    Q_ASSERT(typeData.isValid());
+    g_config->setHeadingSequenceType((HeadingSequenceType)typeData.toInt());
+    g_config->setHeadingSequenceBaseLevel(m_headingSequenceLevelCombo->currentData().toInt());
+
     return true;
 }
 
diff --git a/src/dialog/vsettingsdialog.h b/src/dialog/vsettingsdialog.h
index 3ed31cda..2406134f 100644
--- a/src/dialog/vsettingsdialog.h
+++ b/src/dialog/vsettingsdialog.h
@@ -117,8 +117,8 @@ public:
     QComboBox *m_openModeCombo;
 
     // Whether enable heading sequence.
-    QCheckBox *m_headingSequence;
-    QComboBox *m_headingSequenceCombo;
+    QComboBox *m_headingSequenceTypeCombo;
+    QComboBox *m_headingSequenceLevelCombo;
 
     // Web zoom factor.
     QCheckBox *m_customWebZoom;
diff --git a/src/resources/icons/heading_sequence.svg b/src/resources/icons/heading_sequence.svg
new file mode 100644
index 00000000..b8014ac6
--- /dev/null
+++ b/src/resources/icons/heading_sequence.svg
@@ -0,0 +1,7 @@
+<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg">
+ <!-- Created with SVG-edit - http://svg-edit.googlecode.com/ -->
+ <g>
+  <title>Layer 2</title>
+  <text stroke="#000000" transform="matrix(11.892995768998892,0,0,12.532065948318316,-399.2455647895517,-874.5950374851516) " xml:space="preserve" text-anchor="middle" font-family="Sans-serif" font-size="24" id="svg_1" y="98.48198" x="55.1146" stroke-width="0" fill="#000000">1.2.</text>
+ </g>
+</svg>
diff --git a/src/resources/vnote.ini b/src/resources/vnote.ini
index 60f5b20d..673e97eb 100644
--- a/src/resources/vnote.ini
+++ b/src/resources/vnote.ini
@@ -97,7 +97,8 @@ insert_title_from_note_name=true
 note_open_mode=0
 
 ; Whether auto generate heading sequence
-enable_heading_sequence=false
+; 0 - Disabled, 1 - Enabled, 2 - Enabled only for notes
+heading_sequence_type=0
 
 ; Heading sequence base level
 heading_sequence_base_level=1
diff --git a/src/vconfigmanager.cpp b/src/vconfigmanager.cpp
index 0000c689..256e6f2c 100644
--- a/src/vconfigmanager.cpp
+++ b/src/vconfigmanager.cpp
@@ -191,8 +191,14 @@ void VConfigManager::initialize()
         m_noteOpenMode = OpenFileMode::Read;
     }
 
-    m_enableHeadingSequence = getConfigFromSettings("global",
-                                                    "enable_heading_sequence").toBool();
+    int tmpHeadingSequenceType = getConfigFromSettings("global",
+                                                       "heading_sequence_type").toInt();
+    if (tmpHeadingSequenceType < (int)HeadingSequenceType::Invalid
+        && tmpHeadingSequenceType >= (int)HeadingSequenceType::Disabled) {
+        m_headingSequenceType = (HeadingSequenceType)tmpHeadingSequenceType;
+    } else {
+        m_headingSequenceType = HeadingSequenceType::Disabled;
+    }
 
     m_headingSequenceBaseLevel = getConfigFromSettings("global",
                                                        "heading_sequence_base_level").toInt();
diff --git a/src/vconfigmanager.h b/src/vconfigmanager.h
index 6cd6a91b..1d14d43f 100644
--- a/src/vconfigmanager.h
+++ b/src/vconfigmanager.h
@@ -43,6 +43,18 @@ struct MarkdownitOption
     bool m_linkify;
 };
 
+// Type of heading sequence.
+enum class HeadingSequenceType
+{
+    Disabled = 0,
+    Enabled,
+
+    // Enabled only for internal notes.
+    EnabledNoteOnly,
+
+    Invalid
+};
+
 class VConfigManager : public QObject
 {
 public:
@@ -262,8 +274,8 @@ public:
     OpenFileMode getNoteOpenMode() const;
     void setNoteOpenMode(OpenFileMode p_mode);
 
-    bool getEnableHeadingSequence() const;
-    void setEnableHeadingSequence(bool p_enabled);
+    HeadingSequenceType getHeadingSequenceType() const;
+    void setHeadingSequenceType(HeadingSequenceType p_type);
 
     int getHeadingSequenceBaseLevel() const;
     void setHeadingSequenceBaseLevel(int p_level);
@@ -599,7 +611,7 @@ private:
     OpenFileMode m_noteOpenMode;
 
     // Whether auto genearte heading sequence.
-    bool m_enableHeadingSequence;
+    HeadingSequenceType m_headingSequenceType;
 
     // Heading sequence base level.
     int m_headingSequenceBaseLevel;
@@ -1471,20 +1483,21 @@ inline void VConfigManager::setNoteOpenMode(OpenFileMode p_mode)
                         m_noteOpenMode == OpenFileMode::Read ? 0 : 1);
 }
 
-inline bool VConfigManager::getEnableHeadingSequence() const
+inline HeadingSequenceType VConfigManager::getHeadingSequenceType() const
 {
-    return m_enableHeadingSequence;
+    return m_headingSequenceType;
 }
 
-inline void VConfigManager::setEnableHeadingSequence(bool p_enabled)
+inline void VConfigManager::setHeadingSequenceType(HeadingSequenceType p_type)
 {
-    if (m_enableHeadingSequence == p_enabled) {
+    if (m_headingSequenceType == p_type) {
         return;
     }
 
-    m_enableHeadingSequence = p_enabled;
-    setConfigToSettings("global", "enable_heading_sequence",
-                        m_enableHeadingSequence);
+    m_headingSequenceType = p_type;
+    setConfigToSettings("global",
+                        "heading_sequence_type",
+                        (int)m_headingSequenceType);
 }
 
 inline int VConfigManager::getHeadingSequenceBaseLevel() const
diff --git a/src/vedit.cpp b/src/vedit.cpp
index 9010581c..9e425b55 100644
--- a/src/vedit.cpp
+++ b/src/vedit.cpp
@@ -13,10 +13,12 @@
 extern VConfigManager *g_config;
 extern VNote *g_vnote;
 
-void VEditConfig::init(const QFontMetrics &p_metric)
+void VEditConfig::init(const QFontMetrics &p_metric,
+                       bool p_enableHeadingSequence)
 {
     update(p_metric);
 
+    // Init configs that do not support update later.
     m_enableVimMode = g_config->getEnableVimMode();
 
     if (g_config->getLineDistanceHeight() <= 0) {
@@ -26,6 +28,8 @@ void VEditConfig::init(const QFontMetrics &p_metric)
     }
 
     m_highlightWholeBlock = m_enableVimMode;
+
+    m_enableHeadingSequence = p_enableHeadingSequence;
 }
 
 void VEditConfig::update(const QFontMetrics &p_metric)
@@ -84,7 +88,7 @@ VEdit::VEdit(VFile *p_file, QWidget *p_parent)
 
     updateFontAndPalette();
 
-    m_config.init(QFontMetrics(font()));
+    m_config.init(QFontMetrics(font()), false);
     updateConfig();
 
     connect(this, &VEdit::cursorPositionChanged,
diff --git a/src/vedit.h b/src/vedit.h
index 6eba974b..12b4e6c9 100644
--- a/src/vedit.h
+++ b/src/vedit.h
@@ -37,10 +37,12 @@ public:
                     m_tabSpaces("\t"),
                     m_enableVimMode(false),
                     m_highlightWholeBlock(false),
-                    m_lineDistanceHeight(0)
+                    m_lineDistanceHeight(0),
+                    m_enableHeadingSequence(false)
     {}
 
-    void init(const QFontMetrics &p_metric);
+    void init(const QFontMetrics &p_metric,
+              bool p_enableHeadingSequence);
 
     // Only update those configs which could be updated online.
     void update(const QFontMetrics &p_metric);
@@ -63,6 +65,9 @@ public:
 
     // Line distance height in pixels.
     int m_lineDistanceHeight;
+
+    // Whether enable auto heading sequence.
+    bool m_enableHeadingSequence;
 };
 
 class LineNumberArea;
diff --git a/src/vmainwindow.cpp b/src/vmainwindow.cpp
index e03b9beb..0e131258 100644
--- a/src/vmainwindow.cpp
+++ b/src/vmainwindow.cpp
@@ -331,6 +331,7 @@ void VMainWindow::initViewToolBar(QSize p_iconSize)
     viewToolBar->addAction(expandViewAct);
 }
 
+// Enable/disable all actions of @p_widget.
 static void setActionsEnabled(QWidget *p_widget, bool p_enabled)
 {
     Q_ASSERT(p_widget);
@@ -351,6 +352,22 @@ void VMainWindow::initEditToolBar(QSize p_iconSize)
 
     m_editToolBar->addSeparator();
 
+    m_headingSequenceAct = new QAction(QIcon(":/resources/icons/heading_sequence.svg"),
+                                       tr("Heading Sequence"),
+                                       this);
+    m_headingSequenceAct->setStatusTip(tr("Enable heading sequence in current note in edit mode"));
+    m_headingSequenceAct->setCheckable(true);
+    connect(m_headingSequenceAct, &QAction::triggered,
+            this, [this](bool p_checked){
+                if (isHeadingSequenceApplicable()) {
+                    VMdTab *tab = dynamic_cast<VMdTab *>(m_curTab.data());
+                    Q_ASSERT(tab);
+                    tab->enableHeadingSequence(p_checked);
+                }
+            });
+
+    m_editToolBar->addAction(m_headingSequenceAct);
+
     QAction *boldAct = new QAction(QIcon(":/resources/icons/bold.svg"),
                                    tr("Bold (Ctrl+B)"), this);
     boldAct->setStatusTip(tr("Insert bold text or change selected text to bold"));
@@ -1694,61 +1711,66 @@ void VMainWindow::setCodeBlockStyle(QAction *p_action)
     }
 }
 
-void VMainWindow::updateActionStateFromTabStatusChange(const VFile *p_file,
-                                                       bool p_editMode)
+void VMainWindow::updateActionsStateFromTab(const VEditTab *p_tab)
 {
-    bool systemFile = p_file
-                      && p_file->getType() == FileType::Orphan
-                      && dynamic_cast<const VOrphanFile *>(p_file)->isSystemFile();
+    const VFile *file = p_tab ? p_tab->getFile() : NULL;
+    bool editMode = p_tab ? p_tab->isEditMode() : false;
+    bool systemFile = file
+                      && file->getType() == FileType::Orphan
+                      && dynamic_cast<const VOrphanFile *>(file)->isSystemFile();
 
-    m_printAct->setEnabled(p_file && p_file->getDocType() == DocType::Markdown);
-    m_exportAsPDFAct->setEnabled(p_file && p_file->getDocType() == DocType::Markdown);
+    m_printAct->setEnabled(file && file->getDocType() == DocType::Markdown);
+    m_exportAsPDFAct->setEnabled(file && file->getDocType() == DocType::Markdown);
 
-    discardExitAct->setVisible(p_file && p_editMode);
-    saveExitAct->setVisible(p_file && p_editMode);
-    editNoteAct->setEnabled(p_file && p_file->isModifiable() && !p_editMode);
+    discardExitAct->setVisible(file && editMode);
+    saveExitAct->setVisible(file && editMode);
+    editNoteAct->setEnabled(file && file->isModifiable() && !editMode);
     editNoteAct->setVisible(!saveExitAct->isVisible());
-    saveNoteAct->setEnabled(p_file && p_editMode);
-    deleteNoteAct->setEnabled(p_file && p_file->getType() == FileType::Note);
-    noteInfoAct->setEnabled(p_file && !systemFile);
+    saveNoteAct->setEnabled(file && editMode);
+    deleteNoteAct->setEnabled(file && file->getType() == FileType::Note);
+    noteInfoAct->setEnabled(file && !systemFile);
 
-    m_attachmentBtn->setEnabled(p_file && p_file->getType() == FileType::Note);
+    m_attachmentBtn->setEnabled(file && file->getType() == FileType::Note);
 
-    m_insertImageAct->setEnabled(p_file && p_editMode);
+    m_insertImageAct->setEnabled(file && editMode);
 
-    setActionsEnabled(m_editToolBar, p_file && p_editMode);
+    setActionsEnabled(m_editToolBar, file && editMode);
+
+    // Handle heading sequence act independently.
+    m_headingSequenceAct->setEnabled(isHeadingSequenceApplicable());
+    const VMdTab *mdTab = dynamic_cast<const VMdTab *>(p_tab);
+    m_headingSequenceAct->setChecked(mdTab && mdTab->isHeadingSequenceEnabled());
 
     // Find/Replace
-    m_findReplaceAct->setEnabled(p_file);
-    m_findNextAct->setEnabled(p_file);
-    m_findPreviousAct->setEnabled(p_file);
-    m_replaceAct->setEnabled(p_file && p_editMode);
-    m_replaceFindAct->setEnabled(p_file && p_editMode);
-    m_replaceAllAct->setEnabled(p_file && p_editMode);
+    m_findReplaceAct->setEnabled(file);
+    m_findNextAct->setEnabled(file);
+    m_findPreviousAct->setEnabled(file);
+    m_replaceAct->setEnabled(file && editMode);
+    m_replaceFindAct->setEnabled(file && editMode);
+    m_replaceAllAct->setEnabled(file && editMode);
 
-    if (!p_file) {
+    if (!file) {
         m_findReplaceDialog->closeDialog();
     }
 }
 
 void VMainWindow::handleAreaTabStatusUpdated(const VEditTabInfo &p_info)
 {
-    bool editMode = false;
     m_curTab = p_info.m_editTab;
     if (m_curTab) {
         m_curFile = m_curTab->getFile();
-        editMode = m_curTab->isEditMode();
     } else {
         m_curFile = NULL;
     }
 
-    updateActionStateFromTabStatusChange(m_curFile, editMode);
+    updateActionsStateFromTab(m_curTab);
 
     m_attachmentList->setFile(dynamic_cast<VNoteFile *>(m_curFile.data()));
 
     QString title;
     if (m_curFile) {
-        m_findReplaceDialog->updateState(m_curFile->getDocType(), editMode);
+        m_findReplaceDialog->updateState(m_curFile->getDocType(),
+                                         m_curTab->isEditMode());
 
         if (m_curFile->getType() == FileType::Note) {
             const VNoteFile *tmpFile = dynamic_cast<const VNoteFile *>((VFile *)m_curFile);
@@ -2465,3 +2487,19 @@ void VMainWindow::openStartupPages()
         break;
     }
 }
+
+bool VMainWindow::isHeadingSequenceApplicable() const
+{
+    if (!m_curTab) {
+        return false;
+    }
+
+    Q_ASSERT(m_curFile);
+
+    if (!m_curFile->isModifiable()
+        || m_curFile->getDocType() != DocType::Markdown) {
+        return false;
+    }
+
+    return true;
+}
diff --git a/src/vmainwindow.h b/src/vmainwindow.h
index 9b9b36ea..2a273c49 100644
--- a/src/vmainwindow.h
+++ b/src/vmainwindow.h
@@ -202,8 +202,10 @@ private:
 
     void initEditorStyleMenu(QMenu *p_emnu);
     void updateWindowTitle(const QString &str);
-    void updateActionStateFromTabStatusChange(const VFile *p_file,
-                                              bool p_editMode);
+
+    // Update state of actions according to @p_tab.
+    void updateActionsStateFromTab(const VEditTab *p_tab);
+
     void saveStateAndGeometry();
     void restoreStateAndGeometry();
     void repositionAvatar();
@@ -231,6 +233,10 @@ private:
     // Will not change m_panelViewState.
     void changePanelView(PanelViewState p_state);
 
+    // Whether heading sequence is applicable to current tab.
+    // Only available for writable Markdown file.
+    bool isHeadingSequenceApplicable() const;
+
     VNote *vnote;
     QPointer<VFile> m_curFile;
     QPointer<VEditTab> m_curTab;
@@ -285,6 +291,9 @@ private:
 
     QAction *m_autoIndentAct;
 
+    // Enable heading sequence for current note.
+    QAction *m_headingSequenceAct;
+
     // Act group for render styles.
     QActionGroup *m_renderStyleActs;
 
diff --git a/src/vmdedit.cpp b/src/vmdedit.cpp
index 59d16ca8..2ca757a0 100644
--- a/src/vmdedit.cpp
+++ b/src/vmdedit.cpp
@@ -464,7 +464,7 @@ void VMdEdit::updateHeaders(const QVector<VElementRegion> &p_headerRegions)
 
     m_headers.clear();
 
-    bool autoSequence = g_config->getEnableHeadingSequence() && !isReadOnly();
+    bool autoSequence = m_config.m_enableHeadingSequence && !isReadOnly();
     int headingSequenceBaseLevel = g_config->getHeadingSequenceBaseLevel();
     if (headingSequenceBaseLevel < 1 || headingSequenceBaseLevel > 6) {
         headingSequenceBaseLevel = 1;
diff --git a/src/vmdtab.cpp b/src/vmdtab.cpp
index 80514e75..cfa605bd 100644
--- a/src/vmdtab.cpp
+++ b/src/vmdtab.cpp
@@ -22,13 +22,25 @@ extern VConfigManager *g_config;
 
 VMdTab::VMdTab(VFile *p_file, VEditArea *p_editArea,
                OpenFileMode p_mode, QWidget *p_parent)
-    : VEditTab(p_file, p_editArea, p_parent), m_editor(NULL), m_webViewer(NULL),
-      m_document(NULL), m_mdConType(g_config->getMdConverterType())
+    : VEditTab(p_file, p_editArea, p_parent),
+      m_editor(NULL),
+      m_webViewer(NULL),
+      m_document(NULL),
+      m_mdConType(g_config->getMdConverterType()),
+      m_enableHeadingSequence(false)
 {
     V_ASSERT(m_file->getDocType() == DocType::Markdown);
 
     m_file->open();
 
+    HeadingSequenceType headingSequenceType = g_config->getHeadingSequenceType();
+    if (headingSequenceType == HeadingSequenceType::Enabled) {
+        m_enableHeadingSequence = true;
+    } else if (headingSequenceType == HeadingSequenceType::EnabledNoteOnly
+               && m_file->getType() == FileType::Note) {
+        m_enableHeadingSequence = true;
+    }
+
     setupUI();
 
     if (p_mode == OpenFileMode::Edit) {
@@ -344,6 +356,7 @@ void VMdTab::setupMarkdownEditor()
 {
     Q_ASSERT(m_file->isModifiable() && !m_editor);
     qDebug() << "create Markdown editor";
+
     m_editor = new VMdEdit(m_file, m_document, m_mdConType, this);
     connect(dynamic_cast<VMdEdit *>(m_editor), &VMdEdit::headersChanged,
             this, &VMdTab::updateOutlineFromHeaders);
@@ -372,6 +385,7 @@ void VMdTab::setupMarkdownEditor()
     connect(m_editor, SIGNAL(ready(void)),
             this, SLOT(restoreFromTabInfo(void)));
 
+    enableHeadingSequence(m_enableHeadingSequence);
     m_editor->reloadFile();
     m_stacks->addWidget(m_editor);
 }
@@ -654,3 +668,18 @@ void VMdTab::restoreFromTabInfo()
     // Clear it anyway.
     m_infoToRestore.clear();
 }
+
+void VMdTab::enableHeadingSequence(bool p_enabled)
+{
+    m_enableHeadingSequence = p_enabled;
+
+    if (m_editor) {
+        VEditConfig &config = m_editor->getConfig();
+        config.m_enableHeadingSequence = m_enableHeadingSequence;
+    }
+}
+
+bool VMdTab::isHeadingSequenceEnabled() const
+{
+    return m_enableHeadingSequence;
+}
diff --git a/src/vmdtab.h b/src/vmdtab.h
index eebf9c6d..15417129 100644
--- a/src/vmdtab.h
+++ b/src/vmdtab.h
@@ -65,6 +65,11 @@ public:
     // Create a filled VEditTabInfo.
     VEditTabInfo fetchTabInfo() const Q_DECL_OVERRIDE;
 
+    // Enable or disable heading sequence.
+    void enableHeadingSequence(bool p_enabled);
+
+    bool isHeadingSequenceEnabled() const;
+
 public slots:
     // Enter edit mode.
     void editFile() Q_DECL_OVERRIDE;
@@ -149,6 +154,9 @@ private:
     VDocument *m_document;
     MarkdownConverterType m_mdConType;
 
+    // Whether heading sequence is enabled.
+    bool m_enableHeadingSequence;
+
     QStackedLayout *m_stacks;
 };
 
diff --git a/src/vnote.qrc b/src/vnote.qrc
index 267d34c7..883a2be2 100644
--- a/src/vnote.qrc
+++ b/src/vnote.qrc
@@ -131,5 +131,6 @@
         <file>resources/icons/sort.svg</file>
         <file>resources/icons/create_subdir.svg</file>
         <file>resources/icons/compact_mode.svg</file>
+        <file>resources/icons/heading_sequence.svg</file>
     </qresource>
 </RCC>