diff --git a/applications/fpvviewer/fpvv_drawer.pas b/applications/fpvviewer/fpvv_drawer.pas
index c70c6ac0a..fa054545e 100644
--- a/applications/fpvviewer/fpvv_drawer.pas
+++ b/applications/fpvviewer/fpvv_drawer.pas
@@ -29,6 +29,22 @@ type
     procedure HandleMouseUp(Sender: TObject; Button: TMouseButton;
       Shift: TShiftState; X, Y: Integer);
     procedure Clear;
+  public
+    property OnDblClick;
+    property OnTripleClick;
+    property OnQuadClick;
+    property OnDragDrop;
+    property OnDragOver;
+    property OnEndDock;
+    property OnEndDrag;
+    property OnMouseDown;
+    property OnMouseMove;
+    property OnMouseUp;
+    property OnMouseEnter;
+    property OnMouseLeave;
+    property OnMouseWheel;
+    property OnMouseWheelDown;
+    property OnMouseWheelUp;
   end;
 
 implementation
diff --git a/applications/fpvviewer/fpvv_mainform.lfm b/applications/fpvviewer/fpvv_mainform.lfm
index 06aabe6cb..951fbd85d 100644
--- a/applications/fpvviewer/fpvv_mainform.lfm
+++ b/applications/fpvviewer/fpvv_mainform.lfm
@@ -14,7 +14,7 @@ object frmFPVViewer: TfrmFPVViewer
     Height = 424
     Top = 176
     Width = 485
-    PageIndex = 0
+    PageIndex = 1
     Align = alClient
     Anchors = [akLeft, akBottom]
     TabOrder = 0
@@ -26,7 +26,7 @@ object frmFPVViewer: TfrmFPVViewer
         AnchorSideTop.Control = btnSearchInTokens
         AnchorSideTop.Side = asrBottom
         Left = 0
-        Height = 378
+        Height = 392
         Top = 32
         Width = 485
         Align = alBottom
@@ -65,7 +65,7 @@ object frmFPVViewer: TfrmFPVViewer
     TabOrder = 1
     object editFileName: TFileNameEdit
       Left = 8
-      Height = 22
+      Height = 23
       Top = 8
       Width = 304
       DialogOptions = []
@@ -87,7 +87,7 @@ object frmFPVViewer: TfrmFPVViewer
     end
     object spinScale: TFloatSpinEdit
       Left = 72
-      Height = 16
+      Height = 23
       Top = 97
       Width = 168
       DecimalPlaces = 6
@@ -100,9 +100,9 @@ object frmFPVViewer: TfrmFPVViewer
     end
     object Label1: TLabel
       Left = 8
-      Height = 16
+      Height = 15
       Top = 97
-      Width = 55
+      Width = 46
       Caption = 'Scale by:'
       ParentColor = False
     end
@@ -144,15 +144,15 @@ object frmFPVViewer: TfrmFPVViewer
     end
     object Label2: TLabel
       Left = 8
-      Height = 16
+      Height = 15
       Top = 72
-      Width = 88
+      Width = 73
       Caption = 'Y adjustment:'
       ParentColor = False
     end
     object spinAdjustY: TSpinEdit
       Left = 80
-      Height = 16
+      Height = 23
       Top = 72
       Width = 72
       Increment = 100
@@ -162,7 +162,7 @@ object frmFPVViewer: TfrmFPVViewer
     end
     object spinAdjustX: TSpinEdit
       Left = 232
-      Height = 16
+      Height = 23
       Top = 72
       Width = 72
       Increment = 50
@@ -172,9 +172,9 @@ object frmFPVViewer: TfrmFPVViewer
     end
     object Label3: TLabel
       Left = 160
-      Height = 16
+      Height = 15
       Top = 72
-      Width = 88
+      Width = 73
       Caption = 'X adjustment:'
       ParentColor = False
     end
@@ -189,18 +189,18 @@ object frmFPVViewer: TfrmFPVViewer
     end
     object Label4: TLabel
       Left = 9
-      Height = 16
+      Height = 15
       Top = 126
-      Width = 153
+      Width = 128
       Caption = 'Force encoding on read:'
       ParentColor = False
     end
     object comboEncoding: TComboBox
       Left = 144
-      Height = 20
+      Height = 23
       Top = 126
       Width = 128
-      ItemHeight = 0
+      ItemHeight = 15
       ItemIndex = 0
       Items.Strings = (
         'Read from the file'
@@ -236,17 +236,17 @@ object frmFPVViewer: TfrmFPVViewer
     end
     object labelFileEncoding: TLabel
       Left = 278
-      Height = 16
+      Height = 15
       Top = 130
-      Width = 88
+      Width = 74
       Caption = 'File encoding:'
       ParentColor = False
     end
     object checkForceWhiteBackground: TCheckBox
       Left = 9
-      Height = 18
+      Height = 19
       Top = 152
-      Width = 178
+      Width = 153
       Caption = 'Force white background?'
       TabOrder = 11
     end
diff --git a/applications/fpvviewer/fpvv_mainform.pas b/applications/fpvviewer/fpvv_mainform.pas
index 64407d4cb..f0e3f3e90 100644
--- a/applications/fpvviewer/fpvv_mainform.pas
+++ b/applications/fpvviewer/fpvv_mainform.pas
@@ -51,6 +51,8 @@ type
   private
     procedure MyContourLineDrawingProc(z,x1,y1,x2,y2: Double);
     function FPVDebugAddItemProc(AStr: string; AParent: Pointer): Pointer;
+    procedure HandleDrawerMouseWheel(Sender: TObject; Shift: TShiftState;
+       WheelDelta: Integer; MousePos: TPoint; var Handled: Boolean);
   public
     { public declarations }
     Drawer: TFPVVDrawer;
@@ -357,6 +359,7 @@ begin
   Drawer.Left := 5;
   Drawer.AnchorClient(5);
   Drawer.TabStop := True;
+  Drawer.OnMouseWheel := @HandleDrawerMouseWheel;
 end;
 
 procedure TfrmFPVViewer.FormDestroy(Sender: TObject);
@@ -390,5 +393,17 @@ begin
   Result := lTreeItem;
 end;
 
+procedure TfrmFPVViewer.HandleDrawerMouseWheel(Sender: TObject;
+  Shift: TShiftState; WheelDelta: Integer; MousePos: TPoint;
+  var Handled: Boolean);
+begin
+  if WheelDelta > 0 then
+    spinScale.Value := spinScale.Value + spinScale.Increment
+  else
+    spinScale.Value := spinScale.Value - spinScale.Increment;
+
+  btnVisualize.Click();
+end;
+
 end.