diff --git a/src/blackgui/components/settingstextmessagestyle.cpp b/src/blackgui/components/settingstextmessagestyle.cpp
index 6ddb7b998..45627adfd 100644
--- a/src/blackgui/components/settingstextmessagestyle.cpp
+++ b/src/blackgui/components/settingstextmessagestyle.cpp
@@ -12,11 +12,17 @@
 #include "settingsfontdialog.h"
 #include "texteditdialog.h"
 #include "settingstextmessagestyle.h"
+#include "blackgui/shortcut.h"
 
 #include <QTextEdit>
 #include <QPushButton>
 #include <QRegularExpression>
 #include <QStringBuilder>
+#include <QKeySequence>
+#include <QStringBuilder>
+
+#include <QShortcut>
+
 
 namespace BlackGui
 {
@@ -32,6 +38,12 @@ namespace BlackGui
             connect(ui->pb_Style, &QPushButton::released, this, &CSettingsTextMessageStyle::changeStyle);
             connect(ui->pb_Reset, &QPushButton::released, this, &CSettingsTextMessageStyle::resetStyle);
             connect(ui->pb_Reset, &QPushButton::released, this, &CSettingsTextMessageStyle::changed);
+            connect(ui->pb_FontMinus, &QPushButton::released, this, &CSettingsTextMessageStyle::fontSizeMinus);
+            connect(ui->pb_FontPlus, &QPushButton::released, this, &CSettingsTextMessageStyle::fontSizePlus);
+
+//            QShortcut *sc = new QShortcut(CShortcut::keyFontMinus(), this);
+//            sc->setContext(Qt::WidgetWithChildrenShortcut);
+//            QObject::connect(sc, &QShortcut::activatedAmbiguously, this, &CSettingsTextMessageStyle::fontSizePlus);
         }
 
         CSettingsTextMessageStyle::~CSettingsTextMessageStyle()
@@ -84,13 +96,62 @@ namespace BlackGui
             if (familySizeStlye.size() != 3) { return false; }
             static const QString f("font-family: \"%1\"; font-size: %2; font-style: %3");
 
-            QString style = m_style;
             const QString tableStyle = QStringLiteral("table { ") % f.arg(familySizeStlye.at(0), familySizeStlye.at(1), familySizeStlye.at(2)) % QStringLiteral(" }");
+            this->replaceTableStyle(tableStyle);
+            return true;
+        }
 
+        void CSettingsTextMessageStyle::replaceTableStyle(const QString &newTableStyle)
+        {
+            QString style = m_style;
             thread_local const QRegularExpression re("table\\s*\\{.*\\}");
-            style.replace(re, tableStyle);
-
+            style.replace(re, newTableStyle);
             m_style = style;
+        }
+
+        void CSettingsTextMessageStyle::fontSizeMinus()
+        {
+            if (this->changeFontSize(false))
+            {
+                emit this->changed();
+            }
+        }
+
+        void CSettingsTextMessageStyle::fontSizePlus()
+        {
+            if (this->changeFontSize(true))
+            {
+                emit this->changed();
+            }
+        }
+
+        bool CSettingsTextMessageStyle::changeFontSize(bool increase)
+        {
+            QString style = m_style;
+            thread_local const QRegularExpression re("table\\s*\\{.*:\\s*(\\d{1,2}).*\\}");
+            const QRegularExpressionMatch match = re.match(style);
+            const QStringList matches = match.capturedTexts();
+            if (matches.size() != 2) { return false; }
+
+            bool ok;
+            int ptSize = matches.last().toInt(&ok);
+            if (!ok) { return false; }
+            if (increase)
+            {
+                ptSize++;
+                if (ptSize > 16) { return false; }
+            }
+            else
+            {
+                ptSize--;
+                if (ptSize < 6) { return false; }
+            }
+
+            const QString pt = QString::number(ptSize) % "pt";
+            QString tableStyle = matches.front();
+            thread_local const QRegularExpression rePt("\\d{1,2}pt");
+            tableStyle.replace(rePt, pt);
+            this->replaceTableStyle(tableStyle);
             return true;
         }
     } // ns
diff --git a/src/blackgui/components/settingstextmessagestyle.h b/src/blackgui/components/settingstextmessagestyle.h
index bae69946c..e95b5297c 100644
--- a/src/blackgui/components/settingstextmessagestyle.h
+++ b/src/blackgui/components/settingstextmessagestyle.h
@@ -45,6 +45,11 @@ namespace BlackGui
             //! Style
             void setStyle(const QString &style) { m_style = style; }
 
+            //! Font size @{
+            void fontSizeMinus();
+            void fontSizePlus();
+            //! @}
+
             //! Reset style
             void resetStyle() { m_style.clear(); }
 
@@ -66,6 +71,12 @@ namespace BlackGui
 
             //! Update the font part
             bool setFontFamilySizeStyle(const QStringList &familySizeStlye);
+
+            //! Replace the table style in style
+            void replaceTableStyle(const QString &newTableStyle);
+
+            //! Increase/decrease font size
+            bool changeFontSize(bool increase);
         };
     } // ns
 } // ns
diff --git a/src/blackgui/components/settingstextmessagestyle.ui b/src/blackgui/components/settingstextmessagestyle.ui
index 77f21ac26..0a5f41a08 100644
--- a/src/blackgui/components/settingstextmessagestyle.ui
+++ b/src/blackgui/components/settingstextmessagestyle.ui
@@ -2,16 +2,8 @@
 <ui version="4.0">
  <class>CSettingsTextMessageStyle</class>
  <widget class="QFrame" name="CSettingsTextMessageStyle">
-  <property name="geometry">
-   <rect>
-    <x>0</x>
-    <y>0</y>
-    <width>301</width>
-    <height>26</height>
-   </rect>
-  </property>
   <property name="windowTitle">
-   <string>Frame</string>
+   <string>Text message style</string>
   </property>
   <layout class="QHBoxLayout" name="hl_SettingsTextMessageStyle">
    <property name="leftMargin">
@@ -27,17 +19,32 @@
     <number>3</number>
    </property>
    <item>
-    <spacer name="hs_TextMessageStyle">
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
+    <widget class="QPushButton" name="pb_FontPlus">
+     <property name="toolTip">
+      <string>font enlarge (plus)</string>
      </property>
-     <property name="sizeHint" stdset="0">
-      <size>
-       <width>40</width>
-       <height>20</height>
-      </size>
+     <property name="text">
+      <string>+</string>
      </property>
-    </spacer>
+     <property name="icon">
+      <iconset resource="../../blackmisc/blackmisc.qrc">
+       <normaloff>:/pastel/icons/pastel/16/font-enlarge.png</normaloff>:/pastel/icons/pastel/16/font-enlarge.png</iconset>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QPushButton" name="pb_FontMinus">
+     <property name="toolTip">
+      <string>font shrink (minus)</string>
+     </property>
+     <property name="text">
+      <string>-</string>
+     </property>
+     <property name="icon">
+      <iconset resource="../../blackmisc/blackmisc.qrc">
+       <normaloff>:/pastel/icons/pastel/16/font-shrink.png</normaloff>:/pastel/icons/pastel/16/font-shrink.png</iconset>
+     </property>
+    </widget>
    </item>
    <item>
     <widget class="QPushButton" name="pb_Reset">
@@ -62,6 +69,15 @@
    </item>
   </layout>
  </widget>
- <resources/>
+ <tabstops>
+  <tabstop>pb_FontPlus</tabstop>
+  <tabstop>pb_FontMinus</tabstop>
+  <tabstop>pb_Reset</tabstop>
+  <tabstop>pb_Style</tabstop>
+  <tabstop>pb_Font</tabstop>
+ </tabstops>
+ <resources>
+  <include location="../../blackmisc/blackmisc.qrc"/>
+ </resources>
  <connections/>
 </ui>