Hi,

If I add a new Set, say Set11, the graph format changes
so C1 to C3 become the Legend and Ave, Set1 to Set11
become the 'x' axis.

how do you add the new Set? After that, do you create a new graph, or do you
just expand data range?
I think, after creating a new chart you have to switch columns/rows.

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Cheers,
Lisa