diff --git a/apps/speedalt/README.md b/apps/speedalt/README.md
index 67505384f..0ee818609 100644
--- a/apps/speedalt/README.md
+++ b/apps/speedalt/README.md
@@ -1,8 +1,11 @@
-Displays the GPS speed and altitude. One is displayed on the watch face using the largest possible characters depending on the number of digits. The other is in a smaller characters below that. Both are always visible.
+Displays the GPS speed and altitude. One is displayed on the watch face using the largest possible characters depending on the number of digits. The other is in a smaller characters below that. Both are always visible. You can display the current or maximum observed speed/altitude values.
 
 Display Tap : Swaps the displays. You can have either speed or altitude on the large display.
 
-BTN3 : Select the desired display units. Speed can be as per the default locale, kph, knots, mph or m/s. Altitude can be feet or metres.
+BTN3 : Short press < 2 secs toggles the displays between showing the current speed/alt values or the maximum values recorded.
+BTN3 : Long press > 2 secs resets the recorded maximum values.
+
+App Settings : Select the desired display units. Speed can be as per the default locale, kph, knots, mph or m/s. Altitude can be feet or metres. Also select whether time is displayed or hidden.
 
 <img src="screen1.png">
 <img src="screen2.png">