Add preference for OVP visibility.

src/Mod/Sketcher/Gui/SketcherSettings.cpp

@@ -117,6 +117,12 @@ void SketcherSettings::saveSettings()
     }
     hGrp->SetBool("DimensioningDiameter", Diameter);
     hGrp->SetBool("DimensioningRadius", Radius);
+
+    hGrp = App::GetApplication().GetParameterGroupByPath(
+        "User parameter:BaseApp/Preferences/Mod/Sketcher/Tools");
+
+    index = ui->ovpVisibility->currentIndex();
+    hGrp->SetInt("OnViewParameterVisibility", index);
 }
 
 void SketcherSettings::loadSettings()
@@ -157,6 +163,16 @@ void SketcherSettings::loadSettings()
     bool Radius = hGrp->GetBool("DimensioningRadius", true);
     index = Diameter ? (Radius ? 0 : 1) : 2;
     ui->radiusDiameterMode->setCurrentIndex(index);
+
+    hGrp = App::GetApplication().GetParameterGroupByPath(
+        "User parameter:BaseApp/Preferences/Mod/Sketcher/Tools");
+    ui->ovpVisibility->clear();
+    ui->ovpVisibility->addItem(tr("Disabled"));
+    ui->ovpVisibility->addItem(tr("Only dimensional"));
+    ui->ovpVisibility->addItem(tr("All"));
+
+    index = hGrp->GetInt("OnViewParameterVisibility", 1);
+    ui->ovpVisibility->setCurrentIndex(index);
 }
 
 void SketcherSettings::dimensioningModeChanged(int index)

src/Mod/Sketcher/Gui/SketcherSettings.ui

@@ -213,6 +213,38 @@ This setting is only for the toolbar. Whichever you chose, all tools are always
     </widget>
    </item>
    <item row="4" column="0">
+    <widget class="QGroupBox" name="groupBox_6">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Expanding" vsizetype="Minimum">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="title">
+      <string>Tool Parameters</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_general">
+      <item row="0" column="0">
+       <widget class="QLabel" name="ovpVisibilityLabel">
+        <property name="text">
+         <string> On-View-Parameters :</string>
+        </property>
+       </widget>
+      </item>
+	  <item row="0" column="1">
+       <widget class="QComboBox" name="ovpVisibility">
+        <property name="toolTip">
+         <string>Choose a visibility mode for the On-View-Parameters:
+'Disabled': On-View-Parameters are completely disabled.
+'Only dimensional': Only dimensional On-View-Parameters are visible. They are the most useful. For example the radius of a circle.
+'All': Both dimensional and positional On-View-Parameters. Positionals are the (x,y) position of the cursor. For example for the center of a circle.</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item row="5" column="0">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>