Select Columns for each Y Axis

We often want to graph a parameter against its predicted value.  For example production of one product (oil) against the forcast for that product (oil forecast).  In order to do more than one product (oil and gas), we have to make multiple graphs because the current line plot settings allow either a single axis or force every line on a separate axis.  It is not helpful to see the production and forecast unless they are on the same axis, but often production of one product is significantly larger than production of another product so using a single axis does not allow enough detail (see attachment for example use cases).

I listed that I need this yesterday because right now we are using tools other than Spotfire (i.e. Excel) for this capability.  In order to more fully adopt Spotfire, we will need to have this common graphing ability.