diff --git a/src/Mod/Sketcher/Gui/CommandConstraints.cpp b/src/Mod/Sketcher/Gui/CommandConstraints.cpp
index f16ff8a05c..4d34476bd1 100644
--- a/src/Mod/Sketcher/Gui/CommandConstraints.cpp
+++ b/src/Mod/Sketcher/Gui/CommandConstraints.cpp
@@ -2339,8 +2339,12 @@ void CmdSketcherConstrainCoincident::activated(int iMsg)
                 commitCommand();
                 tryAutoRecomputeIfNotSolve(Obj);
 
-                QMessageBox::information(Gui::getMainWindow(), QObject::tr("Constraint Substitution"),
-                                        QObject::tr("Endpoint to endpoint tangency was applied instead."));
+                ParameterGrp::handle hGrp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Mod/Sketcher/General");
+                
+                if(hGrp->GetBool("NotifyConstraintSubstitutions", true)) {
+                    QMessageBox::information(Gui::getMainWindow(), QObject::tr("Constraint Substitution"),
+                                            QObject::tr("Endpoint to endpoint tangency was applied instead."));
+                }
 
                 getSelection().clearSelection();
                 return;
@@ -4561,9 +4565,12 @@ void CmdSketcherConstrainTangent::activated(int iMsg)
                     commitCommand();
                     tryAutoRecomputeIfNotSolve(Obj);
 
-                    QMessageBox::information(Gui::getMainWindow(), QObject::tr("Constraint Substitution"),
+                    ParameterGrp::handle hGrp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Mod/Sketcher/General");
+                    
+                    if(hGrp->GetBool("NotifyConstraintSubstitutions", true)) {
+                        QMessageBox::information(Gui::getMainWindow(), QObject::tr("Constraint Substitution"),
                                          QObject::tr("Endpoint to endpoint tangency was applied. The coincident constraint was deleted."));
-
+                    }
                     getSelection().clearSelection();
                     return;
                 }
diff --git a/src/Mod/Sketcher/Gui/SketcherSettings.cpp b/src/Mod/Sketcher/Gui/SketcherSettings.cpp
index e215216c75..5f7aa495d8 100644
--- a/src/Mod/Sketcher/Gui/SketcherSettings.cpp
+++ b/src/Mod/Sketcher/Gui/SketcherSettings.cpp
@@ -106,6 +106,7 @@ void SketcherSettings::saveSettings()
     ui->checkBoxTVShowLinks->onSave();
     ui->checkBoxTVShowSupport->onSave();
     ui->checkBoxTVRestoreCamera->onSave();
+    ui->checkBoxNotifyConstraintSubstitutions->onSave();
     form->saveSettings();
 
     ParameterGrp::handle hViewGrp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/View");
@@ -132,6 +133,7 @@ void SketcherSettings::loadSettings()
     ui->checkBoxTVShowLinks->onRestore();
     ui->checkBoxTVShowSupport->onRestore();
     ui->checkBoxTVRestoreCamera->onRestore();
+    ui->checkBoxNotifyConstraintSubstitutions->onRestore();
     form->loadSettings();
 
     std::list<int> sizes = Gui::Inventor::MarkerBitmaps::getSupportedSizes("CIRCLE_FILLED");
diff --git a/src/Mod/Sketcher/Gui/SketcherSettings.ui b/src/Mod/Sketcher/Gui/SketcherSettings.ui
index 704344cf6b..ce1cf3b6d8 100644
--- a/src/Mod/Sketcher/Gui/SketcherSettings.ui
+++ b/src/Mod/Sketcher/Gui/SketcherSettings.ui
@@ -280,6 +280,61 @@
         </layout>
        </widget>
       </item>
+      <item row="8" column="0" colspan="2">
+       <widget class="QGroupBox" name="groupBox_5">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Expanding" vsizetype="Minimum">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>0</height>
+         </size>
+        </property>
+        <property name="maximumSize">
+         <size>
+          <width>16777215</width>
+          <height>16777215</height>
+         </size>
+        </property>
+        <property name="baseSize">
+         <size>
+          <width>0</width>
+          <height>0</height>
+         </size>
+        </property>
+        <property name="title">
+         <string>Notifications</string>
+        </property>
+        <layout class="QVBoxLayout" name="verticalLayout_22">
+         <item>
+          <widget class="Gui::PrefCheckBox" name="checkBoxNotifyConstraintSubstitutions">
+           <property name="toolTip">
+            <string>Notify automatic constraint substitutions.</string>
+           </property>
+           <property name="text">
+            <string>Notify automatic constraint substitutions</string>
+           </property>
+           <property name="checked">
+            <bool>true</bool>
+           </property>
+           <property name="prefEntry" stdset="0">
+            <cstring>NotifyConstraintSubstitutions</cstring>
+           </property>
+           <property name="prefPath" stdset="0">
+            <cstring>Mod/Sketcher/General</cstring>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </widget>
+      </item>
       <item row="3" column="0">
        <widget class="QLabel" name="label_10">
         <property name="text">