diff --git a/src/app/geometry/geometry.pri b/src/app/geometry/geometry.pri
index ace62fcf9..5f7ffc6e3 100644
--- a/src/app/geometry/geometry.pri
+++ b/src/app/geometry/geometry.pri
@@ -10,7 +10,9 @@ HEADERS += \
     geometry/vequidistant.h \
     geometry/vabstractcurve.h \
     geometry/vnodedetail_p.h \
-    geometry/vdetail_p.h
+    geometry/vdetail_p.h \
+    geometry/vgobject_p.h \
+    geometry/varc_p.h
 
 SOURCES += \
     geometry/vsplinepoint.cpp \
diff --git a/src/app/geometry/vabstractcurve.h b/src/app/geometry/vabstractcurve.h
index 53521614b..f3d70aa5f 100644
--- a/src/app/geometry/vabstractcurve.h
+++ b/src/app/geometry/vabstractcurve.h
@@ -44,20 +44,9 @@ public:
     VAbstractCurve& operator= (const VAbstractCurve &curve);
     virtual QVector<QPointF> GetPoints() const =0;
     virtual QPainterPath     GetPath(PathDirection direction = PathDirection::Hide) const;
-    virtual QString          name() const;
     virtual qreal            GetLength() const =0;
 protected:
     QPainterPath             ShowDirection(const QVector<QPointF> &points) const;
 };
 
-//---------------------------------------------------------------------------------------------------------------------
-/**
- * @brief name return curve name. This name used in variables.
- * @return name
- */
-inline QString VAbstractCurve::name() const
-{
-    return _name;
-}
-
 #endif // VABSTRACTCURVE_H
diff --git a/src/app/geometry/varc.cpp b/src/app/geometry/varc.cpp
index f26f9aaa6..0c4d5a512 100644
--- a/src/app/geometry/varc.cpp
+++ b/src/app/geometry/varc.cpp
@@ -59,7 +59,7 @@ VArc::VArc (VPointF center, qreal radius, QString formulaRadius, qreal f1, QStri
     : VAbstractCurve(GOType::Arc, idObject, mode), f1(f1), formulaF1(formulaF1), f2(f2), formulaF2(formulaF2),
       radius(radius), formulaRadius(formulaRadius), center(center)
 {
-    _name = QString (arc_+"%1").arg(this->GetCenter().name());
+    setName(QString (arc_+"%1").arg(this->GetCenter().name()));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -67,7 +67,7 @@ VArc::VArc(VPointF center, qreal radius, qreal f1, qreal f2)
     : VAbstractCurve(GOType::Arc, 0, Draw::Calculation), f1(f1), formulaF1(QStringLiteral("")), f2(f2),
       formulaF2(QStringLiteral("")), radius(radius), formulaRadius(QStringLiteral("")), center(center)
 {
-    _name = QString (arc_+"%1").arg(this->GetCenter().name());
+    setName(QString (arc_+"%1").arg(this->GetCenter().name()));
     formulaF1 = QString("%1").arg(f1);
     formulaF2 = QString("%1").arg(f2);
     formulaRadius = QString("%1").arg(radius);
@@ -215,10 +215,10 @@ QPointF VArc::CutArc(const qreal &length, VArc &arc1, VArc &arc2) const
     line.setAngle(line.angle()+n);
 
     arc1 = VArc (center, radius, formulaRadius, f1, formulaF1, line.angle(), QString().setNum(line.angle()),
-                 idObject, mode);
+                 getIdObject(), getMode());
 
     arc2 = VArc (center, radius, formulaRadius, line.angle(), QString().setNum(line.angle()), f2, formulaF2,
-                 idObject, mode);
+                 getIdObject(), getMode());
     return line.p2();
 }
 
@@ -238,6 +238,6 @@ QPointF VArc::CutArc(const qreal &length) const
  */
 void VArc::setId(const quint32 &id)
 {
-    _id = id;
-    _name = QString (arc_+"%1_%2").arg(center.name()).arg(id);
+    VAbstractCurve::setId(id);
+    setName(QString (arc_+"%1_%2").arg(center.name()).arg(id));
 }
diff --git a/src/app/geometry/vgobject.cpp b/src/app/geometry/vgobject.cpp
index f99e322e7..d5e069eec 100644
--- a/src/app/geometry/vgobject.cpp
+++ b/src/app/geometry/vgobject.cpp
@@ -27,13 +27,14 @@
  *************************************************************************/
 
 #include "vgobject.h"
+#include "vgobject_p.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief VGObject default constructor.
  */
 VGObject::VGObject()
-    :_id(NULL_ID), type(GOType::Unknown), idObject(NULL_ID), _name(QString()), mode(Draw::Calculation)
+    :d(new VGObjectData)
 {}
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -44,7 +45,7 @@ VGObject::VGObject()
  * @param mode mode creation. Used in modeling mode.
  */
 VGObject::VGObject(const GOType &type, const quint32 &idObject, const Draw &mode)
-    :_id(NULL_ID), type(type), idObject(idObject), _name(QString()), mode(mode)
+    :d(new VGObjectData(type, idObject, mode))
 {}
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -53,7 +54,7 @@ VGObject::VGObject(const GOType &type, const quint32 &idObject, const Draw &mode
  * @param obj object.
  */
 VGObject::VGObject(const VGObject &obj)
-    :_id(obj.id()), type(obj.getType()), idObject(obj.getIdObject()), _name(obj.name()), mode(obj.getMode())
+    :d (obj.d)
 {}
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -68,14 +69,14 @@ VGObject &VGObject::operator=(const VGObject &obj)
     {
         return *this;
     }
-    this->_id      = obj.id();
-    this->type     = obj.getType();
-    this->idObject = obj.getIdObject();
-    this->_name    = obj.name();
-    this->mode     = obj.getMode();
+    d = obj.d;
     return *this;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+VGObject::~VGObject()
+{}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief getIdObject return parent id.
@@ -83,7 +84,7 @@ VGObject &VGObject::operator=(const VGObject &obj)
  */
 quint32 VGObject::getIdObject() const
 {
-    return idObject;
+    return d->idObject;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -93,7 +94,7 @@ quint32 VGObject::getIdObject() const
  */
 void VGObject::setIdObject(const quint32 &value)
 {
-    idObject = value;
+    d->idObject = value;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -103,7 +104,7 @@ void VGObject::setIdObject(const quint32 &value)
  */
 QString VGObject::name() const
 {
-    return _name;
+    return d->_name;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -113,7 +114,7 @@ QString VGObject::name() const
  */
 void VGObject::setName(const QString &name)
 {
-    _name = name;
+    d->_name = name;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -123,7 +124,7 @@ void VGObject::setName(const QString &name)
  */
 Draw VGObject::getMode() const
 {
-    return mode;
+    return d->mode;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -133,7 +134,7 @@ Draw VGObject::getMode() const
  */
 void VGObject::setMode(const Draw &value)
 {
-    mode = value;
+    d->mode = value;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -143,7 +144,13 @@ void VGObject::setMode(const Draw &value)
  */
 GOType VGObject::getType() const
 {
-    return type;
+    return d->type;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VGObject::setType(const GOType &type)
+{
+    d->type = type;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -153,7 +160,7 @@ GOType VGObject::getType() const
  */
 quint32 VGObject::id() const
 {
-    return _id;
+    return d->_id;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -163,5 +170,5 @@ quint32 VGObject::id() const
  */
 void VGObject::setId(const quint32 &id)
 {
-    _id = id;
+    d->_id = id;
 }
diff --git a/src/app/geometry/vgobject.h b/src/app/geometry/vgobject.h
index 0146af60b..88c5df56d 100644
--- a/src/app/geometry/vgobject.h
+++ b/src/app/geometry/vgobject.h
@@ -32,8 +32,9 @@
 #include "../options.h"
 #include <QString>
 #include <QtGlobal>
+#include <QSharedDataPointer>
 
-enum class GOType : char { Point, Arc, Spline, SplinePath, Unknown };
+class VGObjectData;
 
 /**
  * @brief The VGObject class keep information graphical objects.
@@ -45,31 +46,24 @@ public:
     VGObject(const GOType &type, const quint32 &idObject = 0, const Draw &mode = Draw::Calculation);
     VGObject(const VGObject &obj);
     VGObject& operator= (const VGObject &obj);
-    virtual ~VGObject(){}
+    virtual ~VGObject();
+
     quint32         getIdObject() const;
     void            setIdObject(const quint32 &value);
+
     virtual QString name() const;
     void            setName(const QString &name);
+
     Draw            getMode() const;
     void            setMode(const Draw &value);
+
     GOType          getType() const;
+    void            setType(const GOType &type);
+
     quint32         id() const;
     virtual void    setId(const quint32 &id);
-protected:
-    /** @brief _id id in container. Ned for arcs, spline and spline paths. */
-    quint32 _id;
-
-    /** @brief type type of graphical object */
-    GOType  type;
-
-    /** @brief idObject id of parent object. Only for modeling. All another return 0. */
-    quint32 idObject;
-
-    /** @brief _name object name */
-    QString _name;
-
-    /** @brief mode object created in calculation or drawing mode */
-    Draw    mode;
+private:
+    QSharedDataPointer<VGObjectData> d;
 };
 
 #endif // VGOBJECT_H
diff --git a/src/app/geometry/vpointf.cpp b/src/app/geometry/vpointf.cpp
index b8f96e339..5140878ca 100644
--- a/src/app/geometry/vpointf.cpp
+++ b/src/app/geometry/vpointf.cpp
@@ -42,7 +42,7 @@
 VPointF::VPointF(qreal x, qreal y, const QString &name, qreal mx, qreal my, quint32 idObject, const Draw &mode)
     :VGObject(GOType::Point, idObject, mode), _mx(mx), _my(my), _x(x), _y(y)
 {
-    this->_name = name;
+    setName(name);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -56,7 +56,7 @@ VPointF::VPointF(qreal x, qreal y, const QString &name, qreal mx, qreal my, quin
 VPointF::VPointF(const QPointF &point, const QString &name, qreal mx, qreal my, quint32 idObject, const Draw &mode)
     :VGObject(GOType::Point, idObject, mode), _mx(mx), _my(my), _x(point.x()), _y(point.y())
 {
-    this->_name = name;
+    setName(name);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/geometry/vspline.cpp b/src/app/geometry/vspline.cpp
index 523388d7b..6a321dd3c 100644
--- a/src/app/geometry/vspline.cpp
+++ b/src/app/geometry/vspline.cpp
@@ -652,7 +652,7 @@ qreal VSpline::CalcSqDistance (qreal x1, qreal y1, qreal x2, qreal y2)
  */
 void VSpline::CreateName()
 {
-    _name = QString(spl_+"%1_%2").arg(this->GetP1().name(), this->GetP4().name());
+    setName(QString(spl_+"%1_%2").arg(this->GetP1().name(), this->GetP4().name()));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/geometry/vsplinepath.cpp b/src/app/geometry/vsplinepath.cpp
index 9f8b04ea0..cc24ca401 100644
--- a/src/app/geometry/vsplinepath.cpp
+++ b/src/app/geometry/vsplinepath.cpp
@@ -45,12 +45,13 @@ VSplinePath::VSplinePath(const VSplinePath &splPath)
 void VSplinePath::append(const VSplinePoint &point)
 {
     path.append(point);
-    _name = splPath;
-    _name.append(QString("_%1").arg(path.first().P().name()));
+    QString name = splPath;
+    name.append(QString("_%1").arg(path.first().P().name()));
     if (path.size() > 1)
     {
-        _name.append(QString("_%1").arg(path.last().P().name()));
+        name.append(QString("_%1").arg(path.last().P().name()));
     }
+    setName(name);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/options.h b/src/app/options.h
index 0344d3e1b..787641d49 100644
--- a/src/app/options.h
+++ b/src/app/options.h
@@ -78,6 +78,7 @@ enum class MeasurementsType : char { Standard, Individual };
 enum class NodeDetail : char { Contour, Modeling };
 enum class Contour : char { OpenContour, CloseContour };
 enum class EquidistantType : char { OpenEquidistant, CloseEquidistant };
+enum class GOType : char { Point, Arc, Spline, SplinePath, Unknown };
 
 enum class GHeights : unsigned char { ALL,
                                       H92=92,   H98=98,   H104=104, H110=110, H116=116, H122=122, H128=128, H134=134,