Update 4 6 time series data

4-6-time-series-data.md

@@ -48,7 +48,7 @@ After loading the temperature data and showing it on the **Rendering Pane**, but
 <p align="center">
 ![](img/4-6-data-panel.png)
 
-To see the changes of the temperature over time, you can:
+In order to see the changes of the temperature over time, you can:
 
 *  select the time stamp in the *Select Time* drop-down list and click the *Previous* or *Next* button manually; or
 *  click the upper part of the *Play* button and see the change continuously over time. You can also set the time interval and repeat option by clicking the lower part of the *Play* button.
@@ -58,7 +58,11 @@ To see the changes of the temperature over time, you can:
 
 
 
-( If you want to see the difference between the current time stamp with the previous time stamp, you can..)
+In order to calculate and display the difference of temperature between the current time stamp and the previous time stamp, you can click the *Difference In Time* button in *Horizontal Plane* menu category of the **Menu Bar**.
+
+
+<p align="center">
+![](img/4-6-difference-in-time.png)
 
 <br><br>