Just like this question created 5 year ago: header title for a group of measures to appear in crosstab
Is it possible to be done after 5 years?
This is still an idea to be added to the product in future releases. Please see the following Tableau Community idea: https://community.tableau.com/ideas/1594#comment-3501
Up vote and share the idea to show support for the feature.
Hope this helps!
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