update tbeam device button descriptions

docs/hardware/devices/tbeam/buttons.mdx

@@ -7,11 +7,18 @@ sidebar_position: 3
 
 ## Functionality
 
-- **Reset Button (right)**
-  - _**Single press**_ resets the device.
 - **Power Button (left)**
-  - _**Long press**_ powers the device off or turns it back on again.
+  - **Long press:** Powers the device on or off.
+- **Reset Button (right)**
+  - **Single press:** Resets the device.
 - **Program button (middle)**
-  - _**Single press**_ changes the page of information displayed on the screen.
-  - _**Long press**_ adjusts the contrast of the screen.
-  - _**Triple press**_ sends a broadcast message of the device position.
+  - **Single press:** Changes the information page displayed on the device's screen.
+  - **Double press:** Sends an adhoc ping of the device's position to the network.
+  - **Triple press:** Disables the device's GPS. Repeat to re-enable. (_This will be indicated on both information screen pages on the device's display as shown below_)
+
+<img src="/img/hardware/GPS-disabled.jpg" width="200" align="center-left" />
+<img
+  src="/img/hardware/GPS-disabled-by-button.jpg"
+  width="200"
+  align="center-right"
+/>