diff --git a/README.md b/README.md
index 92e48ad..b2d6428 100644
--- a/README.md
+++ b/README.md
@@ -646,6 +646,9 @@ from gui.widgets.buttons import Button
 ```
 ![Image](./images/pushbuttons.JPG)
 
+In this image `Button` "a" has the focus. Pressing `select` will press the
+`Button`.
+
 This emulates a pushbutton, with a callback being executed each time the button
 is pressed. Physically this consists of pressing the `select` button when the
 `Button` instance has focus. Buttons may be any one of three shapes: `CIRCLE`,
diff --git a/images/bernoulli.png b/images/bernoulli.png
new file mode 100644
index 0000000..d53f4b7
Binary files /dev/null and b/images/bernoulli.png differ
diff --git a/images/cartesian.png b/images/cartesian.png
new file mode 100644
index 0000000..661b79c
Binary files /dev/null and b/images/cartesian.png differ
diff --git a/images/lissajous.png b/images/lissajous.png
new file mode 100644
index 0000000..cf4ab11
Binary files /dev/null and b/images/lissajous.png differ
diff --git a/images/polar.png b/images/polar.png
new file mode 100644
index 0000000..98a4273
Binary files /dev/null and b/images/polar.png differ
diff --git a/images/sine.png b/images/sine.png
new file mode 100644
index 0000000..3453ec2
Binary files /dev/null and b/images/sine.png differ