Originally, the window of classic piping input are in the left of piping model graph, but right now the window of classic piping input keep stay at the top of piping model graph. I appreciate if some one can instrute me how to restore it.

Thanks in advance

Click and drag the data input window off the top margin (border). You must click on the window header to do this. To park the window against the left margin drag the window to the left. KEEP YOUR EYE ON THE CURSOR. Do not let the cursor touch any margin before it touches the left margin. When the cursor touches the left margin, you will see the input window snap into place.

Thanks so much. Done.