diff --git a/src/domain/UBGraphicsItemDelegate.cpp b/src/domain/UBGraphicsItemDelegate.cpp
index de335a3a..910d001c 100644
--- a/src/domain/UBGraphicsItemDelegate.cpp
+++ b/src/domain/UBGraphicsItemDelegate.cpp
@@ -93,8 +93,8 @@ void UBGraphicsItemDelegate::init()
     foreach(DelegateButton* button, mButtons)
     {
         button->hide();
-//        button->setZValue(UBGraphicsScene::toolLayerStart + 2);
-        UBGraphicsItem::assignZValue(button, UBGraphicsScene::toolLayerStart + 2);
+        button->setZValue(UBGraphicsScene::toolLayerStart + 2);
+//        UBGraphicsItem::assignZValue(button, UBGraphicsScene::toolLayerStart + 2);
         button->setFlag(QGraphicsItem::ItemIsSelectable, true);
     }
 }
diff --git a/src/domain/UBGraphicsItemTransformUndoCommand.cpp b/src/domain/UBGraphicsItemTransformUndoCommand.cpp
index e56027ea..e883c8e9 100644
--- a/src/domain/UBGraphicsItemTransformUndoCommand.cpp
+++ b/src/domain/UBGraphicsItemTransformUndoCommand.cpp
@@ -50,7 +50,7 @@ void UBGraphicsItemTransformUndoCommand::undo()
     mItem->setPos(mPreviousPosition);
     mItem->setTransform(mPreviousTransform);
 //    mItem->setZValue(mPreviousZValue);
-    UBGraphicsItem::assignZValue(mItem, mPreviousZValue);
+//    UBGraphicsItem::assignZValue(mItem, mPreviousZValue);
 
     UBResizableGraphicsItem* resizableItem = dynamic_cast<UBResizableGraphicsItem*>(mItem);
 
@@ -63,7 +63,8 @@ void UBGraphicsItemTransformUndoCommand::redo()
     mItem->setPos(mCurrentPosition);
     mItem->setTransform(mCurrentTransform);
 //    mItem->setZValue(mCurrentZValue);
-    UBGraphicsItem::assignZValue(mItem, mCurrentZValue);
+
+    UBGraphicsItem::assignZValue(mItem, /*mCurrentZValue*/mItem->data(UBGraphicsItemData::ItemOwnZValue).toReal());
 
     UBResizableGraphicsItem* resizableItem = dynamic_cast<UBResizableGraphicsItem*>(mItem);
 
diff --git a/src/domain/UBGraphicsScene.cpp b/src/domain/UBGraphicsScene.cpp
index d4a7f8d8..b5a59ed8 100644
--- a/src/domain/UBGraphicsScene.cpp
+++ b/src/domain/UBGraphicsScene.cpp
@@ -60,6 +60,7 @@
 #include "UBGraphicsStroke.h"
 
 #include "core/memcheck.h"
+#include "qtlogger.h"
 
 qreal UBGraphicsScene::backgroundLayerStart = -20000000.0;
 qreal UBGraphicsScene::objectLayerStart = -10000000.0;
@@ -139,6 +140,8 @@ UBGraphicsScene::UBGraphicsScene(UBDocumentProxy* parent)
     }
 
     connect(this, SIGNAL(selectionChanged()), this, SLOT(selectionChangedProcessing()));
+    QtLogger::logger().start("/home/ilia/Documents/tmp/2/log.txt");
+    QtLogger::logger().finish();
 }
 
 UBGraphicsScene::~UBGraphicsScene()
@@ -152,12 +155,15 @@ UBGraphicsScene::~UBGraphicsScene()
 
 void UBGraphicsScene::selectionChangedProcessing()
 {
+    QtLogger::logger().start("/home/ilia/Documents/tmp/2/log.txt");
+    QtLogger::logger() << "selection processing started\n" << endl;
 
-//    if (selectedItems().count())
-//        UBApplication::showMessage("ZValue is " + QString::number(selectedItems().first()->zValue(), 'f'));
+    if (selectedItems().count())
+        UBApplication::showMessage("ZValue is " + QString::number(selectedItems().first()->zValue(), 'f'));
 
 
     QList<QGraphicsItem *> allItemsList = items();
+    QtLogger::logger() << "=====all items searching...======" << endl;
     for( int i = 0; i < allItemsList.size(); i++ )
     {
         QGraphicsItem *nextItem = allItemsList.at(i);
@@ -167,18 +173,27 @@ void UBGraphicsScene::selectionChangedProcessing()
             continue;
         //Temporary stub end (sankore 360)
 //        qreal zValue = nextItem->zValue();
-        nextItem->setZValue(qreal(1));
+//        nextItem->setZValue(nextItem->data(UBGraphicsItemData::ItemOwnZValue).toReal());
+        nextItem->setZValue(1);
+        QtLogger::logger() << "own Z " << QString::number(nextItem->data(UBGraphicsItemData::ItemOwnZValue).toReal(), 'f')
+                           << " next Z " << QString::number(nextItem->zValue(), 'f')<< endl;
 //        qDebug() << QString(" %1 ").arg(i) << QString(" %1 ").arg(zValue);
     }
-
     QList<QGraphicsItem *> selItemsList = selectedItems();
+    QtLogger::logger() << "=====selected items searching...======" << endl;
+    QGraphicsItem *nextItem;
     for( int i = 0; i < selItemsList.size(); i++ )
     {
-        QGraphicsItem *nextItem = selItemsList.at(i);
+        nextItem = selItemsList.at(i);
+        QtLogger::logger() << "own Z " << QString::number(nextItem->data(UBGraphicsItemData::ItemOwnZValue).toReal(), 'f')
+                           << " next Z " << QString::number(nextItem->zValue(), 'f')<< endl;
 //        qreal zValue = nextItem->zValue();
         nextItem->setZValue(2);
 //        qDebug() << QString(" >>> %1 <<< ").arg(i) << QString(" >>> %1 <<< ").arg(zValue);
     }
+    QtLogger::logger()  << "\nselection processing finished" << endl;
+    QtLogger::logger().finish();
+
 }
 
 // MARK: -
diff --git a/src/gui/UBThumbnailWidget.h b/src/gui/UBThumbnailWidget.h
index 5f0543f8..f3f25d6a 100644
--- a/src/gui/UBThumbnailWidget.h
+++ b/src/gui/UBThumbnailWidget.h
@@ -148,8 +148,8 @@ class UBThumbnail
                     if (!mSelectionItem->scene())
                     {
                         item->scene()->addItem(mSelectionItem);
-//                        mSelectionItem->setZValue(item->zValue() - 1);
-                        UBGraphicsItem::assignZValue(mSelectionItem, item->zValue() - 1);
+                        mSelectionItem->setZValue(item->zValue() - 1);
+//                        UBGraphicsItem::assignZValue(mSelectionItem, item->zValue() - 1);
                         mAddedToScene = true;
                     }