diff --git a/src/tools/drawTools/vtoolalongline.h b/src/tools/drawTools/vtoolalongline.h
index 729beb822..35756f9bd 100644
--- a/src/tools/drawTools/vtoolalongline.h
+++ b/src/tools/drawTools/vtoolalongline.h
@@ -69,7 +69,7 @@ public:
                         VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param pointName
      * @param typeLine
      * @param formula
diff --git a/src/tools/drawTools/vtoolarc.h b/src/tools/drawTools/vtoolarc.h
index f4b01e643..36043ea3d 100644
--- a/src/tools/drawTools/vtoolarc.h
+++ b/src/tools/drawTools/vtoolarc.h
@@ -66,7 +66,7 @@ public:
                         VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param center
      * @param radius
      * @param f1
diff --git a/src/tools/drawTools/vtoolbisector.h b/src/tools/drawTools/vtoolbisector.h
index 837628726..d991b3d14 100644
--- a/src/tools/drawTools/vtoolbisector.h
+++ b/src/tools/drawTools/vtoolbisector.h
@@ -80,7 +80,7 @@ public:
                           VDomDocument *doc, VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param formula
      * @param firstPointId
      * @param secondPointId
diff --git a/src/tools/drawTools/vtoolcutspline.h b/src/tools/drawTools/vtoolcutspline.h
index bbb35487e..5c89137eb 100644
--- a/src/tools/drawTools/vtoolcutspline.h
+++ b/src/tools/drawTools/vtoolcutspline.h
@@ -68,7 +68,7 @@ public:
                         VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param pointName
      * @param formula
      * @param splineId
diff --git a/src/tools/drawTools/vtoolcutsplinepath.h b/src/tools/drawTools/vtoolcutsplinepath.h
index 36698efe7..6422285a5 100644
--- a/src/tools/drawTools/vtoolcutsplinepath.h
+++ b/src/tools/drawTools/vtoolcutsplinepath.h
@@ -58,7 +58,7 @@ public:
                         VDomDocument *doc, VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param pointName
      * @param formula
      * @param splineId
diff --git a/src/tools/drawTools/vtoolendline.h b/src/tools/drawTools/vtoolendline.h
index 1183242cf..c81aadfe4 100644
--- a/src/tools/drawTools/vtoolendline.h
+++ b/src/tools/drawTools/vtoolendline.h
@@ -69,7 +69,7 @@ public:
                         VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param pointName
      * @param typeLine
      * @param formula
diff --git a/src/tools/drawTools/vtoolheight.h b/src/tools/drawTools/vtoolheight.h
index 0e2d8cabf..518e1e7c6 100644
--- a/src/tools/drawTools/vtoolheight.h
+++ b/src/tools/drawTools/vtoolheight.h
@@ -69,7 +69,7 @@ public:
                           VDomDocument *doc, VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param pointName
      * @param typeLine
      * @param basePointId
diff --git a/src/tools/drawTools/vtoolline.h b/src/tools/drawTools/vtoolline.h
index a1a995c5e..0b2840500 100644
--- a/src/tools/drawTools/vtoolline.h
+++ b/src/tools/drawTools/vtoolline.h
@@ -67,7 +67,7 @@ public:
                         VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param firstPoint
      * @param secondPoint
      * @param scene pointer to scene.
diff --git a/src/tools/drawTools/vtoollineintersect.h b/src/tools/drawTools/vtoollineintersect.h
index 035073f30..0528c9cda 100644
--- a/src/tools/drawTools/vtoollineintersect.h
+++ b/src/tools/drawTools/vtoollineintersect.h
@@ -69,7 +69,7 @@ public:
                         VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param p1Line1Id
      * @param p2Line1Id
      * @param p1Line2Id
diff --git a/src/tools/drawTools/vtoolnormal.h b/src/tools/drawTools/vtoolnormal.h
index 643c0f059..6b8662b0a 100644
--- a/src/tools/drawTools/vtoolnormal.h
+++ b/src/tools/drawTools/vtoolnormal.h
@@ -71,7 +71,7 @@ public:
                           VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param formula
      * @param firstPointId
      * @param secondPointId
diff --git a/src/tools/drawTools/vtoolpointofcontact.h b/src/tools/drawTools/vtoolpointofcontact.h
index b08d480a3..ea7cf4447 100644
--- a/src/tools/drawTools/vtoolpointofcontact.h
+++ b/src/tools/drawTools/vtoolpointofcontact.h
@@ -79,7 +79,7 @@ public:
                           VDomDocument *doc, VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param radius
      * @param center
      * @param firstPointId
diff --git a/src/tools/drawTools/vtoolpointofintersection.h b/src/tools/drawTools/vtoolpointofintersection.h
index aa4057eb4..1c469cc40 100644
--- a/src/tools/drawTools/vtoolpointofintersection.h
+++ b/src/tools/drawTools/vtoolpointofintersection.h
@@ -67,7 +67,7 @@ public:
                         VDomDocument *doc, VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param pointName
      * @param firstPointId
      * @param secondPointId
diff --git a/src/tools/drawTools/vtoolshoulderpoint.h b/src/tools/drawTools/vtoolshoulderpoint.h
index 8b79146b6..404e54a70 100644
--- a/src/tools/drawTools/vtoolshoulderpoint.h
+++ b/src/tools/drawTools/vtoolshoulderpoint.h
@@ -80,7 +80,7 @@ public:
                           VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param formula
      * @param p1Line
      * @param p2Line
diff --git a/src/tools/drawTools/vtoolspline.h b/src/tools/drawTools/vtoolspline.h
index c91612e3c..ff77ab343 100644
--- a/src/tools/drawTools/vtoolspline.h
+++ b/src/tools/drawTools/vtoolspline.h
@@ -67,7 +67,7 @@ public:
                         VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param p1
      * @param p4
      * @param kAsm1
diff --git a/src/tools/drawTools/vtoolsplinepath.h b/src/tools/drawTools/vtoolsplinepath.h
index 46b7f356c..849b90522 100644
--- a/src/tools/drawTools/vtoolsplinepath.h
+++ b/src/tools/drawTools/vtoolsplinepath.h
@@ -66,7 +66,7 @@ public:
                          VDomDocument *doc, VContainer *data);
      /**
       * @brief Create
-      * @param _id
+      * @param _id tool id, 0 if tool doesn't exist yet.
       * @param path
       * @param scene pointer to scene.
       * @param doc dom document container
diff --git a/src/tools/drawTools/vtooltriangle.h b/src/tools/drawTools/vtooltriangle.h
index 647fa756a..a14ffb461 100644
--- a/src/tools/drawTools/vtooltriangle.h
+++ b/src/tools/drawTools/vtooltriangle.h
@@ -69,7 +69,7 @@ public:
                           VContainer *data);
     /**
      * @brief Create
-     * @param _id
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param pointName
      * @param axisP1Id
      * @param axisP2Id
diff --git a/src/tools/vtooldetail.h b/src/tools/vtooldetail.h
index dfa4e50cb..6fb1c87b1 100644
--- a/src/tools/vtooldetail.h
+++ b/src/tools/vtooldetail.h
@@ -88,7 +88,7 @@ public:
      * @param scene pointer to scene.
      * @param doc dom document container.
      * @param data container with variables.
-     * @param parse pares file mode.
+     * @param parse parser file mode.
      * @param typeCreation way we create this tool.
      */
     static void                    Create(const qint64 &_id, const VDetail &newDetail, VMainGraphicsScene  *scene,
diff --git a/src/tools/vtooluniondetails.h b/src/tools/vtooluniondetails.h
index e0b4b41fb..1c5e06d49 100644
--- a/src/tools/vtooluniondetails.h
+++ b/src/tools/vtooluniondetails.h
@@ -32,40 +32,76 @@
 #include "vabstracttool.h"
 #include "../dialogs/dialoguniondetails.h"
 
+/**
+ * @brief The VToolUnionDetails class tool union details.
+ */
 class VToolUnionDetails : public VAbstractTool
 {
     Q_OBJECT
 public:
+    /**
+     * @brief VToolUnionDetails costructor.
+     * @param doc dom document container.
+     * @param data dom document container.
+     * @param id object id in container.
+     * @param d1 first detail.
+     * @param d2 second detail.
+     * @param indexD1 index edge in first detail.
+     * @param indexD2 index edge in second detail.
+     * @param typeCreation way we create this tool.
+     * @param parent parent object.
+     */
     VToolUnionDetails(VDomDocument *doc, VContainer *data, const qint64 &id, const VDetail &d1, const VDetail &d2,
                       const ptrdiff_t &indexD1, const ptrdiff_t &indexD2,
                       const Tool::Sources &typeCreation, QObject *parent = 0);
+    /**
+     * @brief setDialog set dialog when user want change tool option.
+     */
     virtual void setDialog() {}
     /**
-     * @brief Create
-     * @param dialog
-     * @param doc dom document container
-     * @param data container with variables
+     * @brief Create help create tool from GUI.
+     * @param dialog dialog.
+     * @param doc dom document container.
+     * @param data container with variables.
      */
     static void  Create(QSharedPointer<DialogUnionDetails> &dialog, VMainGraphicsScene *scene, VDomDocument *doc,
                         VContainer *data);
     /**
-     * @brief Create
-     * @param _id
+     * @brief Create help create tool.
+     * @param _id tool id, 0 if tool doesn't exist yet.
      * @param newDetail
      * @param scene pointer to scene.
      * @param doc dom document container
      * @param data container with variables
-     * @param parse
+     * @param parse parser file mode.
+     * @param typeCreation way we create this tool.
+     */
+    /**
+     * @brief Create help create tool.
+     * @param _id tool id, 0 if tool doesn't exist yet.
+     * @param d1 first detail.
+     * @param d2 second detail.
+     * @param d1id id first detail.
+     * @param d2id id second detail.
+     * @param indexD1 index edge in first detail.
+     * @param indexD2 index edge in second detail.
+     * @param scene pointer to scene.
+     * @param doc dom document container.
+     * @param data container with variables.
+     * @param parse parser file mode.
      * @param typeCreation way we create this tool.
      */
     static void  Create(const qint64 _id, const VDetail &d1,  const VDetail &d2, const qint64 &d1id, const qint64 &d2id,
                         const ptrdiff_t &indexD1, const ptrdiff_t &indexD2, VMainGraphicsScene *scene,
                         VDomDocument *doc, VContainer *data, const Document::Documents &parse,
                         const Tool::Sources &typeCreation);
-    static QVector<VDetail> GetDetailFromFile(VDomDocument *doc, const QDomElement &domElement);
     /**
-     * @brief TagName
+     * @brief GetDetailFromFile parse detail from file.
+     * @param doc dom document container.
+     * @param domElement tag in xml tree.
+     * @return detail stored in file.
      */
+    static QVector<VDetail> GetDetailFromFile(VDomDocument *doc, const QDomElement &domElement);
     static const QString TagName;
     static const QString ToolType;
     static const QString TagDetail;
@@ -76,13 +112,46 @@ public:
     static const QString AttrNodeType;
     static const QString NodeTypeContour;
     static const QString NodeTypeModeling;
-
+    /**
+     * @brief AddToNewDetail create united detail adding one node per time.
+     * @param tool tool that make union.
+     * @param doc dom document container.
+     * @param data container with variables.
+     * @param newDetail united detail.
+     * @param det detail what we union.
+     * @param i index node in detail.
+     * @param idTool id tool union details.
+     * @param dx bias node x axis.
+     * @param dy bias node y axis.
+     * @param pRotate point rotation.
+     * @param angle angle rotation.
+     */
     static void  AddToNewDetail(QObject *tool, VDomDocument *doc, VContainer *data, VDetail &newDetail,
                                 const VDetail &det, const ptrdiff_t &i, const qint64 &idTool, const qreal &dx = 0,
                                 const qreal &dy = 0, const qint64 &pRotate = 0, const qreal &angle = 0);
+    /**
+     * @brief UpdatePoints update data for united details.
+     * @param idDetail id united detail.
+     * @param data container with variables.
+     * @param det detail what we union.
+     * @param i index node in detail.
+     * @param idCount
+     * @param dx bias node x axis.
+     * @param dy bias node y axis.
+     * @param pRotate point rotation.
+     * @param angle angle rotation.
+     */
     static void  UpdatePoints(const qint64 &idDetail, VContainer *data, const VDetail &det, const ptrdiff_t &i,
                               qint64 &idCount, const qreal &dx = 0, const qreal &dy = 0, const qint64 &pRotate = 0,
                               const qreal &angle = 0);
+    /**
+     * @brief BiasRotatePoint bias and rotate point.
+     * @param point point.
+     * @param dx bias x axis.
+     * @param dy bias y axis.
+     * @param pRotate point rotation.
+     * @param angle angle rotation.
+     */
     static void  BiasRotatePoint(VPointF *point, const qreal &dx, const qreal &dy, const QPointF &pRotate,
                                  const qreal angle);
 public slots:
@@ -101,13 +170,45 @@ protected:
     virtual void RefreshDataInFile();
 private:
     Q_DISABLE_COPY(VToolUnionDetails)
+    /**
+     * @brief d1 first detail.
+     */
     VDetail      d1;
+    /**
+     * @brief d2 second detail.
+     */
     VDetail      d2;
+    /**
+     * @brief indexD1 index edge in first detail.
+     */
     ptrdiff_t    indexD1;
+    /**
+     * @brief indexD2 index edge in second detail.
+     */
     ptrdiff_t    indexD2;
+    /**
+     * @brief AddDetail add detail to xml file.
+     * @param domElement tag in xml tree.
+     * @param d detail.
+     */
     void         AddDetail(QDomElement &domElement, VDetail &d);
+    /**
+     * @brief AddNode add node to xml file.
+     * @param domElement tag in xml tree.
+     * @param node node.
+     */
     void         AddNode(QDomElement &domElement, const VNodeDetail &node);
+    /**
+     * @brief UpdateDetail update detail in xml tree.
+     * @param domNode dom node.
+     * @param d detail.
+     * @return return next detail tag in xml tree if exist.
+     */
     QDomNode     UpdateDetail(const QDomNode &domNode, const VDetail &d);
+    /**
+     * @brief AddToModeling add tool to xml tree.
+     * @param domElement tag in xml tree.
+     */
     void         AddToModeling(const QDomElement &domElement);
 };