diff --git a/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.lfm b/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.lfm
index 10420878f..db36a93a1 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.lfm
+++ b/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.lfm
@@ -19,17 +19,17 @@ inherited BoxPlotFrm: TBoxPlotFrm
       TabOrder = 10
     end
     inherited ComputeBtn: TButton
-      Left = 195
+      Left = 194
       Top = 459
       TabOrder = 9
     end
     inherited ResetBtn: TButton
-      Left = 133
+      Left = 132
       Top = 459
       TabOrder = 8
     end
     inherited HelpBtn: TButton
-      Left = 74
+      Left = 73
       Top = 459
       TabOrder = 7
     end
diff --git a/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.pas b/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.pas
index 4d9626cca..3cb1cf45d 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/boxplotunit.pas
@@ -441,11 +441,6 @@ begin
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
   UpdateBtnStates;
-
-  if Assigned(FReportFrame) then
-    FReportFrame.Clear;
-  if Assigned(FChartFrame) then
-    FChartFrame.Clear;
 end;
 
 
@@ -458,11 +453,6 @@ begin
 
   GrpinBtn.Enabled := (VarList.ItemIndex > -1) and (GroupEdit.Text = '');
   grpoutBtn.Enabled := (GroupEdit.Text <> '');
-
-  if Assigned(FReportFrame) then
-    FReportFrame.UpdateBtnStates;
-  if Assigned(FChartFrame) then
-    FChartFrame.UpdateBtnStates;
 end;
 
 
diff --git a/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.lfm b/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.lfm
index 75e3c898b..cd84d0f46 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.lfm
+++ b/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.lfm
@@ -19,17 +19,17 @@ inherited BreakDownFrm: TBreakDownFrm
       TabOrder = 11
     end
     inherited ComputeBtn: TButton
-      Left = 206
+      Left = 205
       Top = 322
       TabOrder = 10
     end
     inherited ResetBtn: TButton
-      Left = 144
+      Left = 143
       Top = 322
       TabOrder = 9
     end
     inherited HelpBtn: TButton
-      Left = 85
+      Left = 84
       Top = 322
       TabOrder = 8
     end
diff --git a/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.pas b/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.pas
index 609cf0926..106d829a4 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/breakdownunit.pas
@@ -655,6 +655,8 @@ procedure TBreakDownFrm.Reset;
 var
   i: integer;
 begin
+  inherited;
+
   VarList.Clear;
   SelList.Clear;
   DepVar.Text := '';
@@ -665,8 +667,6 @@ begin
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
 
-  if FReportFrame <> nil then
-    FReportFrame.Clear;
   if FAnovaReportFrame <> nil then
     FAnovaReportFrame.Clear;
 
@@ -745,8 +745,6 @@ begin
   SelVarInBtn.Enabled := (VarList.ItemIndex > -1) and (DepVar.Text = '');
   SelVarOutBtn.Enabled := (DepVar.Text <> '');
 
-  if FReportFrame <> nil then
-    FReportFrame.UpdateBtnStates;
   if FAnovaReportFrame <> nil then
     FAnovaReportFrame.UpdateBtnStates;
 end;
diff --git a/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.lfm b/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.lfm
index 7fff22ffc..8983803f6 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.lfm
+++ b/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.lfm
@@ -19,17 +19,17 @@ inherited BubbleForm: TBubbleForm
       TabOrder = 8
     end
     inherited ComputeBtn: TButton
-      Left = 238
+      Left = 237
       Top = 424
       TabOrder = 7
     end
     inherited ResetBtn: TButton
-      Left = 176
+      Left = 175
       Top = 424
       TabOrder = 6
     end
     inherited HelpBtn: TButton
-      Left = 117
+      Left = 116
       Top = 424
       TabOrder = 5
     end
diff --git a/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.pas b/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.pas
index c85592356..d91623bd0 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.pas
@@ -490,11 +490,6 @@ begin
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
   UpdateBtnStates;
-	
-  if Assigned(FReportFrame) then
-    FReportFrame.Clear;
-  if Assigned(FChartFrame) then
-    FChartFrame.Clear;
 end;
 
 
@@ -569,11 +564,6 @@ begin
   XOutBtn.Enabled := XEdit.Text <> '';
   YOutBtn.Enabled := YEdit.Text <> '';
   SizeOutBtn.Enabled := SizeEdit.Text <> '';
-	
-  if Assigned(FReportFrame) then
-    FReportFrame.UpdateBtnStates;
-  if Assigned(FChartFrame) then
-    FChartFrame.UpdateBtnStates;
 end;
 
 
diff --git a/applications/lazstats/source/forms/analysis/descriptive/comparedistunit.pas b/applications/lazstats/source/forms/analysis/descriptive/comparedistunit.pas
index d8d72d76f..a3aba3874 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/comparedistunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/comparedistunit.pas
@@ -549,9 +549,8 @@ begin
   NormalDistChk.Checked := true;
   DistChange(nil);
 
-  if FReportFrame <> nil then FReportFrame.Clear;
-  if FChartFrame <> nil then FChartFrame.Clear;
-  if FFreqChartFrame <> nil then FFreqChartFrame.Clear;
+  if FFreqChartFrame <> nil then
+    FFreqChartFrame.Clear;
 	
   FreqChartPage.TabVisible := false;
 end;
@@ -559,14 +558,16 @@ end;
 
 procedure TCompareDistFrm.UpdateBtnStates;
 begin
+  inherited;
+
+  if FFreqChartFrame <> nil then
+    FFreqChartFrame.UpdateBtnStates;
+
   Var1InBtn.Enabled := (VarList.ItemIndex > -1) and (VarOneEdit.Text = '');
   Var2InBtn.Enabled := (VarList.ItemIndex > -1) and (VarTwoEdit.Text = '');
   Var1OutBtn.Enabled := VarOneEdit.Text <> '';
   Var2OutBtn.Enabled := VarTwoEdit.Text <> '';
 
-  if FReportFrame <> nil then FReportFrame.UpdateBtnStates;
-  if FChartFrame <> nil then FChartFrame.UpdateBtnStates;
-  if FFreqChartFrame <> nil then FFreqChartFrame.UpdateBtnStates;
 end;
 
 
diff --git a/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.lfm b/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.lfm
index bfe94d3e4..8790071bc 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.lfm
+++ b/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.lfm
@@ -19,17 +19,17 @@ inherited CrossTabFrm: TCrossTabFrm
       TabOrder = 7
     end
     inherited ComputeBtn: TButton
-      Left = 182
+      Left = 181
       Top = 317
       TabOrder = 6
     end
     inherited ResetBtn: TButton
-      Left = 120
+      Left = 119
       Top = 317
       TabOrder = 5
     end
     inherited HelpBtn: TButton
-      Left = 61
+      Left = 60
       Top = 317
       TabOrder = 4
     end
diff --git a/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.pas b/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.pas
index 11453f73f..d217c77e9 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/crosstabunit.pas
@@ -38,7 +38,6 @@ type
     procedure UpdateBtnStates; override;
 
   public
-    constructor Create(AOwner: TComponent); override;
     procedure Reset; override;
   end; 
 
@@ -302,30 +301,22 @@ end;
 
 { TCrossTabFrm }
 
-constructor TCrossTabFrm.Create(AOwner: TComponent);
-begin
-  inherited;
-end;
-
-
 procedure TCrossTabFrm.AdjustConstraints;
 begin
   inherited;
+
   ParamsPanel.Constraints.MinWidth := Max(
     4*CloseBtn.Width + 3*CloseBtn.BorderSpacing.Left,
     Max(Label1.Width, Label2.Width) + InBtn.Width + VarList.BorderSpacing.Right * 2
   );
   ParamsPanel.Constraints.MinHeight := 200;
-
-  Constraints.MinWidth := ParamsPanel.Constraints.MinWidth + 300;;
-  Constraints.MinHeight := ParamsPanel.Constraints.MinHeight + 2*ParamsPanel.BorderSpacing.Top;
 end;
 
 
 procedure TCrossTabFrm.Compute;
 var
   lReport: TStringList;
-  calculator: TCrossTabCalculator;
+  crossTab: TCrossTabCalculator;
   var_list: IntDyneVec = nil;
   colNoSelected: IntDyneVec = nil;
 begin
@@ -344,13 +335,13 @@ begin
     lReport.Add('Analyzed data is from file ' + OS3MainFrm.FileNameEdit.Text);
     lReport.Add('');
 
-    calculator := TCrossTabCalculator.Create;
+    crossTab := TCrossTabCalculator.Create;
     try
       Prepare(var_list, colNoSelected);
-      calculator.Execute(lReport, OS3MainFrm.DataGrid, var_list, colNoSelected);
+      crossTab.Execute(lReport, OS3MainFrm.DataGrid, var_list, colNoSelected);
       FReportFrame.DisplayReport(lReport);
     finally
-      calculator.Free;
+      crossTab.Free;
     end;
   finally
     lReport.Free;
@@ -433,14 +424,13 @@ procedure TCrossTabFrm.Reset;
 var
   i: integer;
 begin
+  inherited;
+
   VarList.Clear;
   SelList.Clear;
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
   UpdateBtnStates;
-	
-  if FReportFrame <> nil then
-    FReportFrame.Clear;
 end;
 
 
@@ -463,6 +453,8 @@ var
   lSelected: Boolean;
   i: Integer;
 begin
+  inherited;
+
   lSelected := false;
   for i := 0 to VarList.Items.Count-1 do
     if VarList.Selected[i] then
@@ -480,9 +472,6 @@ begin
       break;
     end;
   OutBtn.Enabled := lSelected;
-
-  if FReportFrame <> nil then
-    FReportFrame.UpdateBtnStates;
 end;
 
 
diff --git a/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.lfm b/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.lfm
index 2cd0c14e9..987456899 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.lfm
+++ b/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.lfm
@@ -21,17 +21,17 @@ inherited DescriptiveFrm: TDescriptiveFrm
     inherited ComputeBtn: TButton
       AnchorSideBottom.Control = ParamsPanel
       AnchorSideBottom.Side = asrBottom
-      Left = 184
+      Left = 183
       Top = 391
       TabOrder = 10
     end
     inherited ResetBtn: TButton
-      Left = 122
+      Left = 121
       Top = 391
       TabOrder = 9
     end
     inherited HelpBtn: TButton
-      Left = 63
+      Left = 62
       Top = 391
       TabOrder = 8
     end
diff --git a/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.pas b/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.pas
index ab2aebc0b..5a8ed33b6 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.pas
@@ -559,16 +559,6 @@ var
   F: TReportFrame;
 begin
   inherited;
-                (*
-  for i := PageControl.PageCount-1 downto 0 do
-  begin
-    if i > 0 then
-      PageControl.Pages[i].Free
-    else begin
-      F := GetReportFrame(i);
-      if Assigned(F) then F.Clear;
-    end;
-  end;            *)
 
   lSelected := false;
   for i := 0 to VarList.Items.Count-1 do
diff --git a/applications/lazstats/source/forms/analysis/descriptive/groupfrequnit.pas b/applications/lazstats/source/forms/analysis/descriptive/groupfrequnit.pas
index 43867d843..2c2296605 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/groupfrequnit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/groupfrequnit.pas
@@ -256,6 +256,7 @@ end;
 procedure TGroupFreqForm.UpdateBtnStates;
 begin
   inherited;
+
   GrpInBtn.Enabled := (VarList.ItemIndex > -1);
   GrpOutBtn.Enabled := (GrpVarEdit.Text <> '');
 end;
diff --git a/applications/lazstats/source/forms/analysis/descriptive/multxvsyunit.pas b/applications/lazstats/source/forms/analysis/descriptive/multxvsyunit.pas
index e12ea42fe..6a56bd1e9 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/multxvsyunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/multxvsyunit.pas
@@ -257,6 +257,7 @@ var
   i: integer;
 begin
   inherited;
+
   VarList.Clear;
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
@@ -265,9 +266,6 @@ begin
   GroupEdit.Text := '';
   LinesChk.Checked := false;
 	
-	if FReportFrame <> nil then FReportFrame.Clear;
-  if FChartFrame <> nil then FChartFrame.Clear;
-	
   UpdateBtnStates;
 end;
 
@@ -296,6 +294,8 @@ var
   lSelected: Boolean;
   i: Integer;
 begin
+  inherited;
+
   lSelected := false;
   for i:=0 to VarList.Items.Count-1 do
     if VarList.Selected[i] then
@@ -310,9 +310,6 @@ begin
   XOutBtn.Enabled := (XEdit.Text <> '');
   YOutBtn.Enabled := (YEdit.Text <> '');
   GroupOutBtn.Enabled := (GroupEdit.Text <> '');
-
-  if FReportFrame <> nil then FReportFrame.UpdateBtnStates;
-  if FChartFrame <> nil then FChartFrame.UpdateBtnStates;
 end;
 
 
diff --git a/applications/lazstats/source/forms/analysis/descriptive/normalityunit.pas b/applications/lazstats/source/forms/analysis/descriptive/normalityunit.pas
index 58114e0f7..b18bd5e8d 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/normalityunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/normalityunit.pas
@@ -419,27 +419,24 @@ procedure TNormalityFrm.Reset;
 var
   i: integer;
 begin
-  TestVarEdit.Text := '';
+  inherited;
+
+  TestVarEdit.Clear;
+
   VarList.Items.Clear;
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
   
-	if Assigned(FReportFrame) then 
-	  FReportFrame.Clear;
-  if Assigned(FChartFrame) then
-    FChartFrame.Clear;
   UpdateBtnStates;
 end;
 
 
 procedure TNormalityFrm.UpdateBtnStates;
 begin
+  inherited;
+
   VarInBtn.Enabled := (VarList.ItemIndex > -1) and (TestVarEdit.Text = '');
   VarOutBtn.Enabled := (TestVarEdit.Text <> '');
-	if Assigned(FReportFrame) then
-    FReportFrame.UpdateBtnStates;
-	if Assigned(FChartFrame) then
-    FChartFrame.UpdateBtnStates;
 end;
 
 
diff --git a/applications/lazstats/source/forms/analysis/descriptive/resistancelineunit.pas b/applications/lazstats/source/forms/analysis/descriptive/resistancelineunit.pas
index bbb59ca8b..05ee81a55 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/resistancelineunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/resistancelineunit.pas
@@ -396,9 +396,6 @@ begin
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
   UpdateBtnStates;
-
-  if FReportFrame <> nil then FReportFrame.Clear;
-  if FChartFrame <> nil then FChartFrame.Clear;
 end;
 
 
diff --git a/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.lfm b/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.lfm
index e80dc75ed..37170774f 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.lfm
+++ b/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.lfm
@@ -19,17 +19,17 @@ inherited XvsMultYForm: TXvsMultYForm
       TabOrder = 6
     end
     inherited ComputeBtn: TButton
-      Left = 158
+      Left = 157
       Top = 459
       TabOrder = 5
     end
     inherited ResetBtn: TButton
-      Left = 96
+      Left = 95
       Top = 459
       TabOrder = 4
     end
     inherited HelpBtn: TButton
-      Left = 37
+      Left = 36
       Top = 459
     end
     inherited ButtonBevel: TBevel
diff --git a/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.pas b/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.pas
index f2e76b7ee..5dbe11cd1 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.pas
@@ -189,20 +189,20 @@ procedure TXvsMultYForm.Reset;
 var
   i: integer;
 begin
-  VarList.Clear;
+  inherited;
+
   YBox.Clear;
   XEdit.Clear;
+  PlotTitleEdit.Clear;
+
   XInBtn.Enabled := true;
   XOutBtn.Enabled := false;
   YInBtn.Enabled := true;
   YOutBtn.Enabled := false;
-  PlotTitleEdit.Text := '';
+
+  VarList.Clear;
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
-	if Assigned(FReportFrame) then
-	  FReportFrame.Clear;
-	if Assigned(FChartFrame) then
-	  FChartFrame.Clear;
 end;
 
 
@@ -210,14 +210,13 @@ procedure TXvsMultYForm.UpdateBtnStates;
 var
   lSelected: Boolean;
 begin
+  inherited;
+
   lSelected := AnySelected(VarList);
   XInBtn.Enabled := lSelected and (XEdit.Text = '');
   YInBtn.Enabled := lSelected;
   xOutBtn.Enabled := (XEdit.Text <> '');
   YOutBtn.Enabled := AnySelected(YBox);
-
-  if Assigned(FReportFrame) then FReportFrame.UpdateBtnStates;
-  if Assigned(FChartFrame) then FChartFrame.UpdateBtnStates;
 end;