diff --git a/docs/changelog/1.6/release-notes.md b/docs/changelog/1.6/release-notes.md
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@@ -1,19 +0,0 @@
-VTK-m 1.6 Release Notes
-=======================
-
-# Table of Contents
-1. [Core](#Core)
-
-2. [ArrayHandle](#ArrayHandle)
-
-3. [Control Environment](#Control-Environment)
-
-4. [Execution Environment](#Execution-Environment)
-
-5. [Worklets and Filters](#Worklets-and-Filters)
-
-6. [Build](#Build)
-
-7. [Other](#Other)
-    - The contents of `vtkm/io/reader` and `vtkm/io/writer` are now moved to `vtkm/io` and are deprecated.
-
diff --git a/docs/changelog/io_reorganize.md b/docs/changelog/io_reorganize.md
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+# Reorganization of `io` directory
+
+The `vtkm/io` directory has been flattened.
+Namely, the files in `vtkm/io/reader` and `vtkm/io/writer` have been moved up into `vtkm/io`,
+with the associated changes in namespaces.
+
+In addition, `vtkm/cont/EncodePNG.h` and `vtkm/cont/DecodePNG.h` have been moved to a more natural home in `vtkm/io`.