To edit an existing element in Stream mode

Select Insert Element.
Select Stream from the Mode option menu.
Specify the portion of the element to be changed by entering two data points.
The former line string is removed and a double rubber band is attached to both points specified. The solid rubber band tells where the new line string is to be entered.
Enter a data point to start drawing the new line string in Stream mode. Then move the table cursor or mouse without pressing the data button.
Reset to pause the stream.
A dashed rubber band displays between the last point entered and the second point specified in step 3.
A line is drawn between the last point entered and the point where the dashed rubber band was connected. The modified element is then placed as a complex chain.