Sorry for resurrecting an old post, but I have a question on your answer.

I can create the fit x by y chart and it creates the graph I'd like. Then I can click the red triangle or right click the graph and add the tukey comparison.

My question is, if I have a hundred+ graphs, is there a way to add the tukey comparison to all the graphs? Or do I need to manually go through and add it to all of them?

Or is there a way to modify all the fit by x test results at once?