You can now also add windows and it all gets dump into a nice directory for each driver.

OCR_tester/Zone.cs

@@ -10,10 +10,12 @@ namespace OCR_tester
     public class Zone
     {
         protected Bitmap FullImage;
-        protected List<Zone> Zones;
-        protected List<Window> Windows;
+        private List<Zone> _zones;
+        private List<Window> _windows;
 
         protected Rectangle _bounds;
+        public List<Zone> Zones { get => _zones; protected set => _zones = value; }
+        public List<Window> Windows { get => _windows; protected set => _windows = value; }
         public Rectangle Bounds { get => _bounds; private set => _bounds = value; }
 
         public Bitmap ZoneImage
@@ -43,15 +45,15 @@ namespace OCR_tester
             Zones = new List<Zone>();
             Windows = new List<Window>();
         }
-        private void AddZone(Rectangle bounds)
-        {
-            if(Fits(bounds))    
-                Zones.Add(new Zone(ZoneImage,bounds));
-        }
-        private void AddWindow(Rectangle bounds)
+        public void AddZone(Rectangle bounds)
         {
             if (Fits(bounds))
-                Windows.Add(new Window(ZoneImage,bounds));
+                Zones.Add(new Zone(ZoneImage, bounds));
+        }
+        public void AddWindow(Rectangle bounds)
+        {
+            if (Fits(bounds))
+                Windows.Add(new Window(ZoneImage, bounds));
         }
         /// <summary>
         /// Checks if the given Rectangle fits in the current zone
@@ -69,5 +71,15 @@ namespace OCR_tester
                 return true;
             }
         }
+        public virtual Bitmap Draw()
+        {
+            Image img = ZoneImage;
+            Graphics g = Graphics.FromImage(img);
+            foreach (Window w in Windows)
+            {
+                g.DrawRectangle(Pens.Blue, w.Bounds);
+            }
+            return (Bitmap)img;
+        }
     }
 }