diff --git a/.gitignore b/.gitignore
index b3f8b43..b7b69af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@
 *.backup
 
 *.backups
+*.visuals
diff --git a/boardchangedui.lfm b/boardchangedui.lfm
index 78d0357..ea5f7b8 100644
--- a/boardchangedui.lfm
+++ b/boardchangedui.lfm
@@ -3,7 +3,7 @@ object boardChangedDialog: TboardChangedDialog
   Height = 116
   Top = 565
   Width = 421
-  BorderStyle = bsNone
+  BorderStyle = bsSingle
   Caption = 'Schaltung geändert'
   ClientHeight = 116
   ClientWidth = 421
diff --git a/dtmain.lfm b/dtmain.lfm
index a5aea5a..dfd0439 100644
--- a/dtmain.lfm
+++ b/dtmain.lfm
@@ -695,6 +695,12 @@ object DigitaltrainerMainForm: TDigitaltrainerMainForm
           RadioItem = True
           OnClick = miColorSchemeDefaultClick
         end
+        object miColorSchemeMediumGray: TMenuItem
+          AutoCheck = True
+          Caption = 'Nebel'
+          RadioItem = True
+          OnClick = miColorSchemeDefaultClick
+        end
       end
     end
   end
diff --git a/dtmain.pas b/dtmain.pas
index d671356..b13a486 100644
--- a/dtmain.pas
+++ b/dtmain.pas
@@ -17,6 +17,7 @@   TDigitaltrainerMainForm = class(TForm)
     boardHorizontalScrollBar: TScrollBar;
     boardImage: TImage;
     MenuItem1: TMenuItem;
+    miColorSchemeMediumGray: TMenuItem;
     miColorSchemeRust: TMenuItem;
     miColorSchemeNeon: TMenuItem;
     miColorSchemeDefault: TMenuItem;
@@ -207,9 +208,11 @@   TDigitaltrainerMainForm = class(TForm)
     if getColorSchemeIndex=1
     then miColorSchemeBlackOnWhite.checked:=true
     else if getColorSchemeIndex=2
-    then miColorSchemeNeon.Checked:=true
+    then miColorSchemeNeon.checked:=true
     else if getColorSchemeIndex=3
-    then miColorSchemeRust.Checked:=true
+    then miColorSchemeRust.checked:=true
+    else if getColorSchemeIndex=4
+    then miColorSchemeMediumGray.checked:=true
     else miColorSchemeDefault.checked:=true;
 
     Application.AddOnKeyDownHandler(@FormKeyDown,false);
@@ -293,14 +296,16 @@   TDigitaltrainerMainForm = class(TForm)
   begin
     if miColorSchemeBlackOnWhite.checked
     then setColorScheme(1)
-    else if miColorSchemeNeon.Checked
+    else if miColorSchemeNeon.checked
     then setColorScheme(2)
-    else if miColorSchemeRust.Checked
+    else if miColorSchemeRust.checked
     then setColorScheme(3)
+    else if miColorSchemeMediumGray.checked
+    then setColorScheme(4)
     else setColorScheme(0);
     applyColorScheme(self);
 
-    selectionShape.Pen.Color:=colorScheme.MARK_COLOR;
+    selectionShape.Pen.color:=colorScheme.MARK_COLOR;
 
     clearSpriteCaches;
     uiAdapter.updateTitleLayer;
diff --git a/palettehandingui.pas b/palettehandingui.pas
index d66152e..f77eb68 100644
--- a/palettehandingui.pas
+++ b/palettehandingui.pas
@@ -428,6 +428,7 @@   TPaletteForm = class(TForm)
     sorting.byColumn:=255;
     setLength(sorting.index,0);
     fillTable(true);
+    updateButtons;
     ShowModal;
   end;
 
diff --git a/sprites.pas b/sprites.pas
index b6925dd..75d4db4 100644
--- a/sprites.pas
+++ b/sprites.pas
@@ -646,7 +646,7 @@
           io_top   : if fy<0 then addCol(colorScheme.GATE_COLOR) else addCol(colorScheme.BOARD_COLOR);
           io_bottom: if fy<0 then addCol(colorScheme.BOARD_COLOR) else addCol(colorScheme.GATE_COLOR);
         end;
-      end else if dtc>radius-1 then begin
+      end else if dtc>radius-1.5 then begin
         case position of
           io_left  : dtc:= fx/radius;
           io_right : dtc:=-fx/radius;
@@ -654,6 +654,7 @@
           io_bottom: dtc:=-fy/radius;
         end;
         if dtc<0 then level:=0 else level:=round(dtc*256);
+        if level<0 then level:=0 else if level>256 then level:=256;
         r+=((256-level)*( colorScheme.GATE_BORDER_COLOR         and 255)+level*( colorScheme.WIRE_COLOR         and 255)) shr 8;
         g+=((256-level)*((colorScheme.GATE_BORDER_COLOR shr  8) and 255)+level*((colorScheme.WIRE_COLOR shr  8) and 255)) shr 8;
         b+=((256-level)*((colorScheme.GATE_BORDER_COLOR shr 16) and 255)+level*((colorScheme.WIRE_COLOR shr 16) and 255)) shr 8;
@@ -672,7 +673,9 @@
       end;
     end;
 
-  CONST sub:array[0..7] of double=(0.0625,0.1875,0.3125,0.4375,0.5625,0.6875,0.8125,0.9375);
+  CONST sub:array[0..7] of double=(-0.4375,-0.3125,-0.1875,-0.0625,0.0625,0.1875,0.3125,0.4375);
+
+      //(0.0625,0.1875,0.3125,0.4375,0.5625,0.6875,0.8125,0.9375);
 
   VAR x,y:longint;
       subX,subY:double;
@@ -941,8 +944,8 @@
   begin
     initBaseShape(zoom,ioMark);
     Bitmap.CanvasBGRA.Pen.color:=0;
-    Bitmap.CanvasBGRA.MoveTo(screenOffset[0]           ,screenOffset[1]+(zoom*height   shr 1));
-    Bitmap.CanvasBGRA.LineTo(screenOffset[0]+zoom*width,screenOffset[1]+(zoom*height   shr 1));
+    Bitmap.CanvasBGRA.MoveTo(screenOffset[0]           +3,screenOffset[1]+(zoom*height   shr 1));
+    Bitmap.CanvasBGRA.LineTo(screenOffset[0]+zoom*width-3,screenOffset[1]+(zoom*height   shr 1));
     if (inIdx>=0) and (inIdx<length(C_inputKey)) then begin
       Bitmap.CanvasBGRA.DrawFontBackground:=true;
       textOut(Bitmap.CanvasBGRA,
diff --git a/taskfinishedunit.lfm b/taskfinishedunit.lfm
index 4f0388b..cc0e141 100644
--- a/taskfinishedunit.lfm
+++ b/taskfinishedunit.lfm
@@ -3,7 +3,7 @@ object TaskFinishedForm: TTaskFinishedForm
   Height = 605
   Top = 168
   Width = 630
-  BorderStyle = bsNone
+  BorderStyle = bsSingle
   Caption = 'Test beendet'
   ClientHeight = 605
   ClientWidth = 630
diff --git a/visuals.pas b/visuals.pas
index a222e11..0833298 100644
--- a/visuals.pas
+++ b/visuals.pas
@@ -151,10 +151,10 @@       T_colorScheme  =record
        ENABLED_TEXT_COLOR   :$0000FF00;
        DISABLED_TEXT_COLOR  :$00808000;
        GATE_COLOR           :$00500000;
-       GATE_LABEL_COLOR     :$000000FF;
+       GATE_LABEL_COLOR     :$000000ff;
        MARK_COLOR           :$0000FFFF;
        BOARD_COLOR          :$00500000;
-       SHADOW_COLOR         :$000000ff;
+       SHADOW_COLOR         :$00000000;
        CORRECT_COLOR        :$0000FF00;
        INCORRECT_COLOR      :$000000ff;
        WIRE_COLOR           :$0000FF00;
@@ -165,7 +165,7 @@       T_colorScheme  =record
        MULTIBIT_COLOR       :$00500000;
        SEVEN_SEGMENT_COLOR  :($00300000,$0000FF00);
 
-       buttonColorTable:($00300000,$00800000,$00FF0000,$00FF5000,$00FF8000,$00FFFF00,$00FFFF30,$00FFFF50,$00FFFF80,$00FFFFA0,$00FFFFFF);
+       buttonColorTable:($00500000,$00700000,$00900000,$00B00000,$00D00000,$00F00000,$00FF1000,$00FF3000,$00FF5000,$00FF7000,$00FF9000);
 
        tableColor     :$00300000;
        tableFixedColor:$00000000;
@@ -183,7 +183,7 @@       T_colorScheme  =record
         DISABLED_TEXT_COLOR  :$00606060;
         GATE_COLOR           :$000060B0;
         GATE_LABEL_COLOR     :$00909090;
-        MARK_COLOR           :$002090FF;
+        MARK_COLOR           :$002090ff;
         BOARD_COLOR          :$00002040;
         SHADOW_COLOR         :$00000000;
         CORRECT_COLOR        :$00008000;
@@ -196,7 +196,7 @@       T_colorScheme  =record
         MULTIBIT_COLOR       :$00808080;
         SEVEN_SEGMENT_COLOR  :($00004080,$00000000);
 
-        buttonColorTable:($00603030,$00703838,$00804040,$00904848,$00A05050,$00B05858,$00BF5F5F,$00CF6767,$00DF6F6F,$00EF7777,$00FF7F7F);
+        buttonColorTable:($00004080,$00003870,$00003060,$00002850,$00002040,$00001830,$00001020,$00000810,$00000000,$00000000,$00000000);
 
         tableColor     :$00004080;
         tableFixedColor:$00002040;
@@ -207,12 +207,45 @@       T_colorScheme  =record
         GATE_BORDER_COLOR:0;
         MENU_BORDER_COLOR:0);
 
+       MEDIUM_GRAY_SCHEME:T_colorScheme=
+         (ENABLED_BUTTON_COLOR :$00808080;
+          DISABLED_BUTTON_COLOR:$00606060;
+          ENABLED_TEXT_COLOR   :$00202020;
+          DISABLED_TEXT_COLOR  :$00404040;
+          GATE_COLOR           :$00B0B0B0;
+          GATE_LABEL_COLOR     :$00404040;
+          MARK_COLOR           :$00FF0000;
+          BOARD_COLOR          :$00a0a0a0;
+          SHADOW_COLOR         :$00909090;
+          CORRECT_COLOR        :$00008000;
+          INCORRECT_COLOR      :$00000080;
+          WIRE_COLOR           :$00000000;
+          BOARD_BOUNDARY_COLOR :$00808080;
+          TRUE_COLOR           :$00c0e0c0;
+          FALSE_COLOR          :$008080b0;
+          UNDETERMINED_COLOR   :$00a0a0a0;
+          MULTIBIT_COLOR       :$00A09080;
+          SEVEN_SEGMENT_COLOR  :($00A0A0A0,$00000000);
+
+          buttonColorTable:($00808080,$00908888,$00A09090,$00B09898,$00C0A0A0,$00D0A8A8,$00E0B0B0,$00F0B8B8,$00FFC0C0,$00FFD0D0,$00FFE0E0);
+
+          tableColor     :$00a0a0a0;
+          tableFixedColor:$00808080;
+          tableAlternativeColor:$00808080;
+          editorBackgroundColor:$00808080;
+          secondaryFormColor: $00909090;
+          panelColor:$00808080;
+          GATE_BORDER_COLOR:0;
+          MENU_BORDER_COLOR:0);
+
   begin
     colorSchemeIndex:=index;
     if      index=1 then colorScheme:=BLACK_ON_WHITE_SCHEME
     else if index=2 then colorScheme:=NEON_SCHEME
     else if index=3 then colorScheme:=RUST_SCHEME
+    else if index=4 then colorScheme:=MEDIUM_GRAY_SCHEME
                     else colorScheme:=DEFAULT_SCHEME;
+
   end;
 
 PROCEDURE setEnableButton(Shape: TShape; CONST labl:TLabel; CONST enable: boolean);
@@ -236,7 +269,7 @@       T_colorScheme  =record
       if control is TShape then begin
         if TShape(control).Brush.style<>bsClear
         then TShape(control).Brush.color:=colorScheme.ENABLED_BUTTON_COLOR;
-        TShape(control).Pen.Color:=colorScheme.MENU_BORDER_COLOR;
+        TShape(control).Pen.color:=colorScheme.MENU_BORDER_COLOR;
       end
       else if control is TStringGrid then begin
         TStringGrid(control).FixedColor:=colorScheme.tableFixedColor;