Select at least one Y column (or a range from at least one Y column). Ideally, select at least two Y columns (or a range of at least two Y columns). If there is an associated X column, X column supplies X values; otherwise, sampling interval of the Y column or row number is used.
Select required data.
Select Plot > Basic 2D : Stack....
Click the Stack button on the 2D Graphs toolbar.
Origin opens the plotstack dialog box.
Customize the options in the dialog and then click OK to create the plot.
STACK.OTP (installed to the Origin program folder).