rename a column header in matrix visual when column represents column value of underlying datatable

Hi Catrice 

You need to have the new column names in a column. You can add a new table similar to below 'Dim Status' which has new status names in a column and the corresponding old names in another column. Create a relationship between two tables on the common [Status] column, with 'Dim Status' filtering the original table. 

Then use 'Dim Status' table's [Status Name] column (the new name column) in the matrix visual as Column field. 

Best Regards,
Community Support Team _ Jing
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