Actually it shows Baseline "0", the "real" baseline. There's just plain
Baseline ('Baseline Zero') and then there's Baselines 1 thru 10, for a total
of 11. There's no way I'm aware of to switch the field used in that dialog
box but you can get the effect of it if you really need to. Under "Save
Interim Plan" there's the ability to copy the data set from any of the
baseline "slots" into any of the other baseline slots. If you really need
to see baseline 2 in the statistics dialog, just use the Save Interim Plan
tool to take the current Baseline, save it into a vacant baseline slot to
preserve it, and then take and copy Baseline 2 into Baseline, overwriting
the old data in the process.
I'm not sure why you want to do this, though. I think of Baseline 1 thru 10
as being there to give you an audit trail of changes that affect the
baseline (ie, scope changes) but are really just there more for historical
curiosity, lessons learned, and CYA than anything else. The just plain
vanilla "Baseline" entry represents the plan that you're presently working
and all progress measurements and comparisons should reference against that
one data set only. What difference does it make, what useful information do
we gain. to see we're 2 weeks behind the plan as it we thought it was going
to be before the customer insisted on adding a set of changes to the
product? We're now working according to the plan AFTER those changes were
included and we need to be measuring progress against that baseline, not the
baseline of the plan we thought we were going to work before the customer
negotiated a change to the contract.