diff --git a/src/ChartJSCore/Plugins/Annotation/Annotation.cs b/src/ChartJSCore/Plugins/Annotation/Annotation.cs
index 0a8e67b..691fb62 100644
--- a/src/ChartJSCore/Plugins/Annotation/Annotation.cs
+++ b/src/ChartJSCore/Plugins/Annotation/Annotation.cs
@@ -11,22 +11,22 @@ public class Annotation
         /// <summary>
         /// Should the scale range be adjusted if this annotation is out of range.
         /// </summary>
-        public bool AdjustScaleRange { get; set; } = true;
+        public bool? AdjustScaleRange { get; set; }
 
         /// <summary>
         /// Fill color.
         /// </summary>
-        public ChartColor BackgroundColor { get; set; } = ChartColor.FromRgba(255, 99, 132, 1);
+        public ChartColor BackgroundColor { get; set; } 
 
         /// <summary>
         /// Stroke color.
         /// </summary>
-        public ChartColor BorderColor { get; set; } = ChartColor.FromRgba(255, 99, 132, 1);
+        public ChartColor BorderColor { get; set; } 
         public List<int> BorderDash { get; set; } = new List<int>();
-        public int BorderDashOffset { get; set; }
+        public int? BorderDashOffset { get; set; }
         public ChartColor BorderShadowColor { get; set; }
         public bool Display { get; set; } = true;
-        public string DrawTime { get; set; } = "afterDatasetsDraw";
+        public string DrawTime { get; set; }
 
         /// <summary>
         /// Identifies a unique id for the annotation and it will be stored in the element context. 
@@ -35,61 +35,60 @@ public class Annotation
         /// array, the id, passed by this option in the annotation, will be used.
         /// </summary>
         public string Id { get; set; }
-        public int ShadowBlur { get; set; } = 0;
-        public int ShadowOffsetX { get; set; } = 0;
-        public int ShadowOffsetY { get; set; } = 0;
+        public int? ShadowBlur { get; set; }
+        public int? ShadowOffsetX { get; set; }
+        public int? ShadowOffsetY { get; set; }
 
         /// <summary>
         /// Left edge of the box in units along the x axis.
         /// </summary>
-        public decimal xMin { get; set; }
+        public double? xMin { get; set; }
 
         /// <summary>
         /// Right edge of the box in units along the x axis.
         /// </summary>
-        public decimal xMax { get; set; }
-
+        public double? xMax { get; set; }
 
         /// <summary>
         /// Top edge of the box in units along the y axis.
         /// </summary>
-        public decimal yMin { get; set; }
+        public double? yMin { get; set; }
 
         /// <summary>
         /// Bottom edge of the box in units along the y axis.
         /// </summary>
-        public decimal yMax { get; set; }
+        public double? yMax { get; set; }
 
         /// <summary>
         /// Adjustment along x-axis (left-right) of label relative to computed position. Negative values move the label left, positive right.
         /// </summary>
-        public decimal xAdjust { get; set; } = 0;
+        public double? xAdjust { get; set; }
 
         /// <summary>
         /// Adjustment along y-axis (top-bottom) of label relative to computed position. Negative values move the label up, positive down.
         /// </summary>
-        public decimal yAdjust { get; set; } = 0;
+        public double? yAdjust { get; set; }
 
         /// <summary>
         ///  ID of the X scale to bind onto. If missing, the plugin will try to use the scale of the chart, 
         ///  configured as 'x' axis. If more than one scale has been defined in the chart as 'x' axis, the
         ///  option is mandatory to select the right scale.
         /// </summary>
-        public decimal xScaleID { get; set; } = 0;
+        public string xScaleID { get; set; }
 
         /// <summary>
         ///  ID of the Y scale to bind onto. If missing, the plugin will try to use the scale of the chart, configured as 
         ///  'y' axis. If more than one scale has been defined in the chart as 'y' axis, the option is mandatory 
         ///  to select the right scale.
         /// </summary>
-        public decimal yScaleID { get; set; } = 0;
+        public string yScaleID { get; set; }
 
         /// <summary>
         ///  The z property determines the drawing stack level of the label annotation element. 
         ///  All visible elements will be drawn in ascending order of z option, with the same drawTime option.
         /// </summary>
-        public decimal z { get; set; } = 0;
-        public decimal? Width { get; set; }
+        public double? z { get; set; }
+        public double? Width { get; set; }
 
         /// <summary>
         /// Overrides the height of the image or canvas element. Could be set in 
@@ -97,17 +96,17 @@ public class Annotation
         /// canvas element by a string. If undefined, uses the height of the 
         /// image or canvas element. It is used only when the content is an image or canvas element.
         /// </summary>
-        public decimal? Height { get; set; }
+        public double? Height { get; set; }
 
         /// <summary>
         /// Anchor position of label on line. Options are: 'left', 'right' or 'center'.
         /// </summary>
-        public string Position { get; set; } = "center";
+        public string Position { get; set; }
 
         /// <summary>
         /// Horizontal alignment of the label text. Options are: 'left', 'right' or 'center'.
         /// </summary>
-        public string TextPosition { get; set; } = "center";
+        public string TextPosition { get; set; }
 
         /// <summary>
         /// Rotation of the label in degrees.
diff --git a/src/ChartJSCore/Plugins/Annotation/LabelAnnotation.cs b/src/ChartJSCore/Plugins/Annotation/LabelAnnotation.cs
index 47a7e81..c02f6ea 100644
--- a/src/ChartJSCore/Plugins/Annotation/LabelAnnotation.cs
+++ b/src/ChartJSCore/Plugins/Annotation/LabelAnnotation.cs
@@ -12,12 +12,12 @@ namespace ChartJSCore.Plugins.Annotation
     public class LabelAnnotation : Annotation
     {
         public string Type { get; private set; } = "label";
-        public decimal? xValue { get; set; }
-        public decimal? yValue { get; set; }
-        public decimal? Height { get; set; }
-        public decimal? Width { get; set; }
+        public double? xValue { get; set; }
+        public double? yValue { get; set; }
+        public double? Height { get; set; }
+        public double? Width { get; set; }
         public List<string> Content { get; set; } = new List<string>();
         public Font Font { get; set; }
-        public ChartColor Color { get; set; } = ChartColor.FromRgba(0, 0, 0, 1);        
+        public ChartColor Color { get; set; }       
     }
 }
diff --git a/src/ChartJSCore/Plugins/Annotation/LineAnnotation.cs b/src/ChartJSCore/Plugins/Annotation/LineAnnotation.cs
index 80d0e32..f6c5053 100644
--- a/src/ChartJSCore/Plugins/Annotation/LineAnnotation.cs
+++ b/src/ChartJSCore/Plugins/Annotation/LineAnnotation.cs
@@ -12,8 +12,8 @@ public class LineAnnotation : Annotation
     {
         public string Type { get; private set; } = "line";
         public LabelAnnotation Label { get; set; }
-        public bool Curve { get; set; }
+        public bool? Curve { get; set; }
         public string ScaleID { get; set; }
-        public int BorderWidth { get; set; } = 2;        
+        public int? BorderWidth { get; set; }      
     }
 }
diff --git a/src/ChartJSCore/Plugins/DataLabels/DataLabels.cs b/src/ChartJSCore/Plugins/DataLabels/DataLabels.cs
index 8bb3a3b..3271c4a 100644
--- a/src/ChartJSCore/Plugins/DataLabels/DataLabels.cs
+++ b/src/ChartJSCore/Plugins/DataLabels/DataLabels.cs
@@ -22,7 +22,7 @@ public class DataLabels: Models.Options
         /// 'left': the label is positioned to the left of the anchor point(180°)
         /// 'top': the label is positioned to the top of the anchor point(270°)
         /// </summary>
-        public string Align { get; set; } = "center";
+        public string Align { get; set; }
 
         /// <summary>
         /// An anchor point is defined by an orientation vector and a position on the data element. 
@@ -35,25 +35,25 @@ public class DataLabels: Models.Options
         /// 'start': lowest element boundary
         /// 'end': highest element boundary
         /// </summary>
-        public string Anchor { get; set; } = "center";
+        public string Anchor { get; set; }
         public ChartColor BackgroundColor { get; set; }
         public ChartColor BorderColor { get; set; }
-        public int BorderRadius { get; set; } = 0;
-        public int BorderWidth { get; set; } = 0;
+        public int? BorderRadius { get; set; }
+        public int? BorderWidth { get; set; }
 
         /// <summary>
         /// The clamp option, when true, enforces the anchor position to be calculated based on 
         /// the visible geometry of the associated element (i.e. part inside the chart area).
         /// </summary>
-        public bool Clamp { get; set; } = false;
+        public bool? Clamp { get; set; }
 
         /// <summary>
         /// When the clip option is true, the part of the label which is outside the chart 
         /// area will be masked (see CanvasRenderingContext2D.clip() )
         /// </summary>
-        public bool Clip { get; set; } = false;
+        public bool? Clip { get; set; }
         public ChartColor Color { get; set; }
-        public bool Display { get; set; } = true;
+        public bool? Display { get; set; }
         public Font Font { get; set; }
         public string Formatter { get; set; }
 
@@ -62,15 +62,15 @@ public class DataLabels: Models.Options
         /// This option is not applicable when align is 'center'. Also note that if align is 'start', 
         /// the label is moved in the opposite direction. The default value is 4.
         /// </summary>
-        public int Offset { get; set; } = 4;
-        public int Opacity { get; set; } = 1;
+        public int? Offset { get; set; }
+        public int? Opacity { get; set; }
         public Padding Padding { get; set; }
-        public int Rotation { get; set; } = 0;
-        public string TextAlign { get; set; } = "start";
+        public int? Rotation { get; set; }
+        public string TextAlign { get; set; }
         public ChartColor TextStrokeColor { get; set; }
 
-        public int TextStrokeWidth { get; set; } = 0;
-        public int TextShadowBlur { get; set; } = 0;
+        public int? TextStrokeWidth { get; set; }
+        public int? TextShadowBlur { get; set; }
         public ChartColor TextShadowColor { get; set; }                      
     }
 }