diff --git a/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.lfm b/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.lfm
index 8e15d2ef6..8e93add50 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.lfm
+++ b/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.lfm
@@ -8,82 +8,33 @@ inherited PlotXYFrm: TPlotXYFrm
   Caption = 'Plot X versus Y'
   ClientHeight = 500
   ClientWidth = 1000
-  OnActivate = FormActivate
-  OnCreate = FormCreate
-  Position = poMainFormCenter
-  object ParamsPanel: TPanel[0]
-    Left = 8
+  inherited ParamsPanel: TPanel
     Height = 484
-    Top = 8
     Width = 376
-    Align = alLeft
-    BorderSpacing.Around = 8
-    BevelOuter = bvNone
     ClientHeight = 484
     ClientWidth = 376
-    TabOrder = 0
-    object CloseBtn: TButton
-      AnchorSideRight.Control = ParamsPanel
-      AnchorSideRight.Side = asrBottom
-      AnchorSideBottom.Control = ParamsPanel
-      AnchorSideBottom.Side = asrBottom
-      Left = 314
-      Height = 25
+    inherited CloseBtn: TButton
+      Left = 321
       Top = 459
-      Width = 62
-      Anchors = [akRight, akBottom]
-      BorderSpacing.Left = 8
-      BorderSpacing.Top = 8
-      Caption = 'Close'
-      ModalResult = 11
-      OnClick = CloseBtnClick
-      TabOrder = 0
     end
-    object ComputeBtn: TButton
-      AnchorSideRight.Control = CloseBtn
-      AnchorSideBottom.Control = ParamsPanel
-      AnchorSideBottom.Side = asrBottom
-      Left = 230
-      Height = 25
+    inherited ComputeBtn: TButton
+      Left = 238
       Top = 459
-      Width = 76
-      Anchors = [akRight, akBottom]
-      BorderSpacing.Left = 8
-      BorderSpacing.Top = 8
-      BorderSpacing.Right = 8
-      Caption = 'Compute'
-      OnClick = ComputeBtnClick
-      TabOrder = 1
     end
-    object ResetBtn: TButton
-      AnchorSideRight.Control = ComputeBtn
-      AnchorSideBottom.Control = ParamsPanel
-      AnchorSideBottom.Side = asrBottom
-      Left = 168
-      Height = 25
+    inherited ResetBtn: TButton
+      Left = 176
       Top = 459
-      Width = 54
-      Anchors = [akRight, akBottom]
-      BorderSpacing.Left = 12
-      BorderSpacing.Top = 8
-      BorderSpacing.Right = 8
-      Caption = 'Reset'
-      OnClick = ResetBtnClick
-      TabOrder = 2
     end
-    object Bevel1: TBevel
-      AnchorSideLeft.Control = ParamsPanel
-      AnchorSideRight.Control = ParamsPanel
-      AnchorSideRight.Side = asrBottom
-      AnchorSideBottom.Control = CloseBtn
-      Left = 0
-      Height = 8
+    inherited HelpBtn: TButton
+      Left = 117
+      Top = 459
+      TabOrder = 11
+    end
+    inherited ButtonBevel: TBevel
       Top = 443
       Width = 376
-      Anchors = [akLeft, akRight, akBottom]
-      Shape = bsBottomLine
     end
-    object Label1: TLabel
+    object Label1: TLabel[5]
       AnchorSideLeft.Control = ParamsPanel
       AnchorSideTop.Control = ParamsPanel
       Left = 0
@@ -93,12 +44,12 @@ inherited PlotXYFrm: TPlotXYFrm
       Caption = 'Variables'
       ParentColor = False
     end
-    object VarList: TListBox
+    object VarList: TListBox[6]
       AnchorSideLeft.Control = ParamsPanel
       AnchorSideTop.Control = Label1
       AnchorSideTop.Side = asrBottom
       AnchorSideRight.Control = XinBtn
-      AnchorSideBottom.Control = Bevel1
+      AnchorSideBottom.Control = ButtonBevel
       AnchorSideBottom.Side = asrBottom
       Left = 0
       Height = 426
@@ -112,7 +63,7 @@ inherited PlotXYFrm: TPlotXYFrm
       OnSelectionChange = VarListSelectionChange
       TabOrder = 3
     end
-    object Label2: TLabel
+    object Label2: TLabel[7]
       AnchorSideLeft.Control = XEdit
       AnchorSideTop.Side = asrBottom
       AnchorSideBottom.Control = XEdit
@@ -125,7 +76,7 @@ inherited PlotXYFrm: TPlotXYFrm
       Caption = 'X Axis Variable'
       ParentColor = False
     end
-    object Label3: TLabel
+    object Label3: TLabel[8]
       AnchorSideLeft.Control = YEdit
       AnchorSideBottom.Control = YEdit
       Left = 209
@@ -137,7 +88,7 @@ inherited PlotXYFrm: TPlotXYFrm
       Caption = 'Y Axis Variable'
       ParentColor = False
     end
-    object XinBtn: TBitBtn
+    object XinBtn: TBitBtn[9]
       AnchorSideLeft.Control = ParamsPanel
       AnchorSideLeft.Side = asrCenter
       AnchorSideTop.Control = VarList
@@ -153,7 +104,7 @@ inherited PlotXYFrm: TPlotXYFrm
       Spacing = 0
       TabOrder = 4
     end
-    object XOutBtn: TBitBtn
+    object XOutBtn: TBitBtn[10]
       AnchorSideLeft.Control = ParamsPanel
       AnchorSideLeft.Side = asrCenter
       AnchorSideTop.Control = XinBtn
@@ -169,7 +120,7 @@ inherited PlotXYFrm: TPlotXYFrm
       Spacing = 0
       TabOrder = 5
     end
-    object YInBtn: TBitBtn
+    object YInBtn: TBitBtn[11]
       AnchorSideLeft.Control = ParamsPanel
       AnchorSideLeft.Side = asrCenter
       AnchorSideTop.Control = XOutBtn
@@ -187,7 +138,7 @@ inherited PlotXYFrm: TPlotXYFrm
       Spacing = 0
       TabOrder = 6
     end
-    object YOutBtn: TBitBtn
+    object YOutBtn: TBitBtn[12]
       AnchorSideLeft.Control = ParamsPanel
       AnchorSideLeft.Side = asrCenter
       AnchorSideTop.Control = YInBtn
@@ -205,7 +156,7 @@ inherited PlotXYFrm: TPlotXYFrm
       Spacing = 0
       TabOrder = 7
     end
-    object XEdit: TEdit
+    object XEdit: TEdit[13]
       AnchorSideLeft.Control = XinBtn
       AnchorSideLeft.Side = asrBottom
       AnchorSideRight.Control = ParamsPanel
@@ -225,7 +176,7 @@ inherited PlotXYFrm: TPlotXYFrm
       TabOrder = 8
       Text = 'XEdit'
     end
-    object YEdit: TEdit
+    object YEdit: TEdit[14]
       AnchorSideLeft.Control = XEdit
       AnchorSideRight.Control = ParamsPanel
       AnchorSideRight.Side = asrBottom
@@ -241,7 +192,7 @@ inherited PlotXYFrm: TPlotXYFrm
       TabOrder = 9
       Text = 'YEdit'
     end
-    object OptionsGroup: TGroupBox
+    object OptionsGroup: TGroupBox[15]
       AnchorSideLeft.Control = XinBtn
       AnchorSideTop.Control = YEdit
       AnchorSideTop.Side = asrBottom
@@ -323,28 +274,13 @@ inherited PlotXYFrm: TPlotXYFrm
       end
     end
   end
-  object ParamsSplitter: TSplitter[1]
-    Left = 392
+  inherited ParamsSplitter: TSplitter
+    Left = 388
     Height = 500
-    Top = 0
-    Width = 5
-    ResizeStyle = rsPattern
   end
-  object PageControl1: TPageControl[2]
-    Left = 405
+  inherited PageControl: TPageControl
+    Left = 397
     Height = 484
-    Top = 8
-    Width = 587
-    ActivePage = ChartPage
-    Align = alClient
-    BorderSpacing.Around = 8
-    TabIndex = 1
-    TabOrder = 2
-    object ReportPage: TTabSheet
-      Caption = 'Report'
-    end
-    object ChartPage: TTabSheet
-      Caption = 'Chart'
-    end
+    Width = 595
   end
 end
diff --git a/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.pas b/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.pas
index 27ad8742a..6d71751f6 100644
--- a/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.pas
+++ b/applications/lazstats/source/forms/analysis/descriptive/plotxyunit.pas
@@ -9,29 +9,20 @@ interface
 uses
   Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs,
   StdCtrls, ExtCtrls, Buttons, ComCtrls,
-  MainUnit, Globals, FunctionsLib, DataProcs, BasicStatsFormUnit, 
+  MainUnit, Globals, FunctionsLib, DataProcs, BasicStatsReportAndChartFormUnit, 
   ReportFrameUnit, ChartFrameUnit;
 
 type
 
   { TPlotXYFrm }
 
-  TPlotXYFrm = class(TBasicStatsForm)
-    Bevel1: TBevel;
+  TPlotXYFrm = class(TBasicStatsReportAndChartForm)
     ConfEdit: TEdit;
     Label4: TLabel;
-    PageControl1: TPageControl;
-    ParamsPanel: TPanel;
-    ResetBtn: TButton;
-    ComputeBtn: TButton;
-    CloseBtn: TButton;
     LineChk: TCheckBox;
     MeansChk: TCheckBox;
     ConfChk: TCheckBox;
     OptionsGroup: TGroupBox;
-    ParamsSplitter: TSplitter;
-    ReportPage: TTabSheet;
-    ChartPage: TTabSheet;
     YEdit: TEdit;
     Label3: TLabel;
     XEdit: TEdit;
@@ -42,11 +33,6 @@ type
     YOutBtn: TBitBtn;
     Label1: TLabel;
     VarList: TListBox;
-    procedure CloseBtnClick(Sender: TObject);
-    procedure ComputeBtnClick(Sender: TObject);
-    procedure FormActivate(Sender: TObject);
-    procedure FormCreate(Sender: TObject);
-    procedure ResetBtnClick(Sender: TObject);
     procedure VarListDblClick(Sender: TObject);
     procedure VarListSelectionChange(Sender: TObject; {%H-}User: boolean);
     procedure XinBtnClick(Sender: TObject);
@@ -55,16 +41,17 @@ type
     procedure YOutBtnClick(Sender: TObject);
   private
     { private declarations }
-    FAutoSized: Boolean;
-    FReportFrame: TReportFrame;
-    FChartFrame: TChartFrame;
     procedure PlotXY(XPoints, YPoints, UpConf, LowConf: DblDyneVec;
       XMean, YMean, R, Slope, Intercept: Double);
-    procedure UpdateBtnStates;
+  protected
+    procedure AdjustConstraints; override;
+    procedure Compute; override;
+    procedure UpdateBtnStates; override;
     function Validate(out AMsg: String; out AControl: TWinControl;
-      Xcol,Ycol: Integer): Boolean;
+      Xcol,Ycol: Integer): Boolean; reintroduce;
   public
     { public declarations }
+    constructor Create(AOwner: TComponent); override;
     procedure Reset; override;
   end; 
 
@@ -82,6 +69,30 @@ uses
 
 { TPlotXYFrm }
 
+constructor TPlotXYFrm.Create(AOwner: TComponent);
+begin
+  inherited;
+
+  FChartFrame.Chart.Legend.Alignment := laBottomCenter;
+  FChartFrame.Chart.Legend.ColumnCount := 3;
+  FChartFrame.Chart.Legend.TextFormat := tfHTML;
+  with FChartFrame.Chart.AxisList.Add do
+  begin
+    Alignment := calRight;
+    Marks.Source := TListChartSource.Create(self);
+    Marks.Style := smsLabel;
+    Grid.Visible := false;
+  end;
+  with FChartFrame.Chart.AxisList.Add do
+  begin
+    Alignment := calTop;
+    Marks.Source := TListChartSource.Create(self);
+    Marks.Style := smsLabel;
+    Grid.Visible := false;
+  end;
+end;
+
+
 procedure TPlotXYfrm.Reset;
 var
   i: integer;
@@ -95,18 +106,16 @@ begin
   VarList.Items.Clear;
   for i := 1 to NoVariables do
     VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
-  FChartFrame.Clear;
-  FReportFrame.Clear;
+
+  if Assigned(FChartFrame) then
+    FChartFrame.Clear;
+  if Assigned(FReportFrame) then
+    FReportFrame.Clear;
+
   UpdateBtnStates;
 end;
 
 
-procedure TPlotXYFrm.ResetBtnClick(Sender: TObject);
-begin
-  Reset;
-end;
-
-
 procedure TPlotXYFrm.VarListDblClick(Sender: TObject);
 var
   index: integer;
@@ -170,7 +179,7 @@ begin
   end;
 end;
 
-procedure TPlotXYFrm.ComputeBtnClick(Sender: TObject);
+procedure TPlotXYFrm.Compute;
 var
   Xmin, Xmax, Ymin, Ymax, SSx, SSY, t, DF: double;
   Xmean, Ymean, Xvariance, Yvariance, Xstddev, Ystddev, ConfBand: double;
@@ -341,73 +350,15 @@ begin
 end;
 
 
-procedure TPlotXYFrm.CloseBtnClick(Sender: TObject);
+procedure TPlotXYFrm.AdjustConstraints;
 begin
-  Close;
-end;
-
-
-procedure TPlotXYFrm.FormActivate(Sender: TObject);
-var
-  w: Integer;
-begin
-  if FAutoSized then
-    exit;
-
-  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
-  ResetBtn.Constraints.MinWidth := w;
-  ComputeBtn.Constraints.MinWidth := w;
-  CloseBtn.Constraints.MinWidth := w;
-
   ParamsPanel.Constraints.MinHeight := OptionsGroup.Top + OptionsGroup.Height +
-    OptionsGroup.BorderSpacing.Bottom + Bevel1.Height +
+    OptionsGroup.BorderSpacing.Bottom + ButtonBevel.Height +
     CloseBtn.Height + CloseBtn.BorderSpacing.Top;
   ParamsPanel.Constraints.MinWidth := OptionsGroup.Width * 2 - XInBtn.Width div 2 - XInBtn.BorderSpacing.Left;
 
   Constraints.MinHeight := ParamsPanel.Constraints.MinHeight + ParamsPanel.BorderSpacing.Around*2;
   Constraints.MinWidth := ParamsPanel.Constraints.MinWidth + 200;
-  if Height < Constraints.MinHeight then Height := 1;
-  if Width < Constraints.MinWidth then Width := 1;
-
-  Position := poDesigned;
-  FAutoSized := True;
-end;
-
-
-procedure TPlotXYFrm.FormCreate(Sender: TObject);
-begin
-  Assert(OS3MainFrm <> nil);
-
-  InitForm(self);
-
-  FReportFrame := TReportFrame.Create(self);
-  FReportFrame.Parent := ReportPage;
-  FReportFrame.Align := alClient;
-
-  FChartFrame := TChartFrame.Create(self);
-  FChartFrame.Parent := ChartPage;
-  FChartFrame.Align := alClient;
-  FChartFrame.Chart.Legend.Alignment := laBottomCenter;
-  FChartFrame.Chart.Legend.ColumnCount := 3;
-  FChartFrame.Chart.Legend.TextFormat := tfHTML;
-  FChartFrame.Chart.BottomAxis.Intervals.MaxLength := 80;
-  FChartFrame.Chart.BottomAxis.Intervals.MinLength := 30;
-  with FChartFrame.Chart.AxisList.Add do
-  begin
-    Alignment := calRight;
-    Marks.Source := TListChartSource.Create(self);
-    Marks.Style := smsLabel;
-    Grid.Visible := false;
-  end;
-  with FChartFrame.Chart.AxisList.Add do
-  begin
-    Alignment := calTop;
-    Marks.Source := TListChartSource.Create(self);
-    Marks.Style := smsLabel;
-    Grid.Visible := false;
-  end;
-
-  Reset;
 end;
 
 
@@ -486,8 +437,10 @@ begin
   YinBtn.Enabled := (VarList.ItemIndex > -1) and (YEdit.Text = '');
   YoutBtn.Enabled := (YEdit.Text <> '');
 
-  FReportFrame.UpdateBtnStates;
-  FChartFrame.UpdateBtnStates;
+  if Assigned(FReportFrame) then
+    FReportFrame.UpdateBtnStates;
+  if Assigned(FChartFrame) then
+    FChartFrame.UpdateBtnStates;
 end;
 
 
diff --git a/applications/lazstats/source/forms/misc/basicstatsreportandchartformunit.pas b/applications/lazstats/source/forms/misc/basicstatsreportandchartformunit.pas
index 40954dc4c..d9f16ec42 100644
--- a/applications/lazstats/source/forms/misc/basicstatsreportandchartformunit.pas
+++ b/applications/lazstats/source/forms/misc/basicstatsreportandchartformunit.pas
@@ -21,6 +21,7 @@ type
   protected
     FReportFrame: TReportFrame;
     FChartFrame: TChartFrame;
+    procedure InitForm; override;
     procedure UpdateBtnStates; override;
 
   public