Create new Extents type and add debugger display attributes.

Dashboard.Common/Box2d.cs

@@ -1,14 +1,15 @@
-using System.ComponentModel.DataAnnotations;
+using System.Diagnostics;
 using System.Drawing;
 using System.Numerics;
 
 namespace Dashboard
 {
+    [DebuggerDisplay("\\{{Min}; {Max}\\}")]
     public readonly record struct Box2d(Vector2 Min, Vector2 Max)
     {
         public float Left => Min.X;
-        public float Right => Max.X;
         public float Top => Min.Y;
+        public float Right => Max.X;
         public float Bottom => Max.Y;
 
         public Vector2 Size => Max - Min;

Dashboard.Common/Box3d.cs

@@ -1,8 +1,9 @@
-using System.Drawing;
+using System.Diagnostics;
 using System.Numerics;
 
 namespace Dashboard
 {
+    [DebuggerDisplay("\\{{Min}; {Max}\\}")]
     public readonly record struct Box3d(Vector3 Min, Vector3 Max)
     {
         public float Left => Min.X;

Dashboard.Common/Extents.cs

@@ -0,0 +1,29 @@
+using System.Diagnostics;
+using System.Numerics;
+
+namespace Dashboard
+{
+    [DebuggerDisplay("{Value}")]
+    public readonly record struct Extents(Vector4 Value)
+    {
+        public float Left => Value.X;
+        public float Top => Value.Y;
+        public float Right => Value.Z;
+        public float Bottom => Value.W;
+
+        public float ExtentWidth => Left + Right;
+
+        public float ExtentHeight => Top + Bottom;
+
+        public Vector2 ExtentSize => new(ExtentWidth, ExtentHeight);
+
+        public Extents(float left, float top, float right, float bottom)
+            : this(new Vector4(left, top, right, bottom))
+        {   
+        }
+
+        public Extents(float value) : this(new Vector4(value))
+        {
+        }
+    }
+}