diff --git a/InstructorsAndTrainees/trainees/dialogeditgroup.ui b/InstructorsAndTrainees/trainees/dialogeditgroup.ui
index 5bb221e..77a4e92 100644
--- a/InstructorsAndTrainees/trainees/dialogeditgroup.ui
+++ b/InstructorsAndTrainees/trainees/dialogeditgroup.ui
@@ -19,10 +19,6 @@
   <property name="windowTitle">
    <string>Group</string>
   </property>
-  <property name="windowIcon">
-   <iconset>
-    <normaloff>:/icons/group.png</normaloff>:/icons/group.png</iconset>
-  </property>
   <layout class="QVBoxLayout" name="verticalLayout_2">
    <item>
     <layout class="QVBoxLayout" name="verticalLayout">
diff --git a/InstructorsAndTrainees/trainees/dialogedittrainee.ui b/InstructorsAndTrainees/trainees/dialogedittrainee.ui
index af10f6b..619d7ec 100644
--- a/InstructorsAndTrainees/trainees/dialogedittrainee.ui
+++ b/InstructorsAndTrainees/trainees/dialogedittrainee.ui
@@ -19,10 +19,6 @@
   <property name="windowTitle">
    <string>Trainee</string>
   </property>
-  <property name="windowIcon">
-   <iconset>
-    <normaloff>:/icons/trainee.png</normaloff>:/icons/trainee.png</iconset>
-  </property>
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <layout class="QVBoxLayout" name="verticalLayout">
diff --git a/InstructorsAndTrainees/trainees/traineesview.cpp b/InstructorsAndTrainees/trainees/traineesview.cpp
index 8283448..4fef0f6 100644
--- a/InstructorsAndTrainees/trainees/traineesview.cpp
+++ b/InstructorsAndTrainees/trainees/traineesview.cpp
@@ -30,9 +30,9 @@ void TraineesView::resizeEvent(QResizeEvent *event)
     else
     {//control
         if(adminMode)
-            widthTrainee = width - (800 + 10);
+            widthTrainee = width - (450 + 10);
         else
-            widthTrainee = width - (670 + 10);
+            widthTrainee = width - (320 + 10);
     }
     if(widthTrainee < 250)
         widthTrainee = 250;
@@ -88,6 +88,10 @@ void TraineesView::preparationTreeWidget()
             treeWidget->setColumnHidden(ColumnsTreeTrainees::clmn_ID, true);
             treeWidget->setColumnHidden(ColumnsTreeTrainees::clmn_Archived, true);
         }
+
+        treeWidget->setColumnHidden(ColumnsTreeTrainees::clmn_Class, true);
+        treeWidget->setColumnHidden(ColumnsTreeTrainees::clmn_Computer, true);
+        treeWidget->setColumnHidden(ColumnsTreeTrainees::clmn_IP_address, true);
     }
 
     treeWidget->setSortingEnabled(true);