diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -146,3 +146,12 @@ to get otherwise.
 Example: (cherrypicked result; original picture by anon)
 
 ![](images/loopback.jpg)
+
+### Png info
+Adds information about generation parameters to PNG as a text chunk. You
+can view this information later using any software that supports viewing
+PNG chunk info, for example: https://www.nayuki.io/page/png-file-chunk-inspector
+
+This can be disabled using the `--disable-pnginfo` command line option.
+
+![](images/pnginfo.png)
diff --git a/images/pnginfo.png b/images/pnginfo.png
new file mode 100644
index 000000000..b6e0f6d17
Binary files /dev/null and b/images/pnginfo.png differ