diff --git a/README.md b/README.md
index 51871464..6cd3b721 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,9 @@ At the moment annotations are saved as a XML file. The format is PASCAL VOC form
 
 You can also see [ImageNet Utils](https://github.com/tzutalin/ImageNet_Utils) to download image, create a label text for machine learning, etc
 
+### Create pre-defined classes
 
+You can edit the [data/predefined_classes.txt](https://github.com/tzutalin/labelImg/blob/master/data/predefined_classes.txt) to load pre-defined classes
 
 ### Hotkeys
 
diff --git a/icons/demo.png b/icons/demo.png
index 9f6cf3a9..7143a044 100644
Binary files a/icons/demo.png and b/icons/demo.png differ