--- a/Depth4Image.st	Mon Mar 07 00:36:06 2016 +0100
+++ b/Depth4Image.st	Mon Mar 07 00:36:31 2016 +0100
@@ -42,13 +42,15 @@
     Most images coming from the windows world are represented as Depth4Images.
     It mainly consists of methods already implemented in Image,
     reimplemented here for more performance.
-
+    Pixels for even x coordinates are stored in the left (high) nibble.
+    Odd x pixels are in the right (low) nibble.
+    
     [author:]
-	Claus Gittinger
+        Claus Gittinger
 
     [see also:]
-	Depth1Image Depth2Image Depth8Image Depth16Image Depth24Image
-	ImageReader
+        Depth1Image Depth2Image Depth8Image Depth16Image Depth24Image
+        ImageReader
 "
 ! !