diff --git a/EnvelopeGenerator.Web/Models/Annotation/Background.cs b/EnvelopeGenerator.Web/Models/Annotation/Background.cs
index 57220365..b9143f5b 100644
--- a/EnvelopeGenerator.Web/Models/Annotation/Background.cs
+++ b/EnvelopeGenerator.Web/Models/Annotation/Background.cs
@@ -1,6 +1,17 @@
-namespace EnvelopeGenerator.Web.Models.Annotation;
+using System.Text.Json.Serialization;
+
+namespace EnvelopeGenerator.Web.Models.Annotation;
 
 public class Background
 {
+    [JsonIgnore]
     public int Margin { get; init; }
+
+    public double? Width { get; set; }
+
+    public double? Height { get; set; }
+
+    public double? Left { get; set; }
+
+    public double? Top { get; set; }
 }