diff --git a/ground/src/experimental/DialTest/README.txt b/ground/src/experimental/DialTest/README.txt
index 12aea7ef8..9b3e76c6c 100644
--- a/ground/src/experimental/DialTest/README.txt
+++ b/ground/src/experimental/DialTest/README.txt
@@ -1,3 +1,4 @@
 Widget experiments. Compile and run test application
-to see widget.
+to see widget. Change bg.svg file to load different
+background.