Get column headers to dynamically fit to frame

Hi, kaweckil 

Based on your description, I've created the following sample data:

I've created the following measures:

Actuals1 = SUM(SalesData[Actuals])
Budgets1 = SUM(SalesData[Budgets])
Forecasts1 = SUM(SalesData[Forecasts])
Var_Act_vs_Fcst = [Actuals1] - [Forecasts1]
Var_Act_vs_Bud = [Actuals1] - [Budgets1]

To be able to dynamically change the matrix header based on the slicer selection, I created the following header table:

I use the following DAX expression to create a measure that toggles the measure for the corresponding matrix header:

MatrixValues = 
SWITCH(
    MAX(Mappings[TableHeaders]),
    "Actual", [Actuals1],
    "Budget", [Budgets1],
    "Forecast", [Forecasts1],
    "Var Act vs Fcst", [Var_Act_vs_Fcst],
    "Var Act vs Bud", [Var_Act_vs_Bud]
)

I've created a matrix with these fields, and a slicer with the TableHeaders field:

When I select the corresponding title in the slicer, the title of the matrix also changes automatically:

I have provided the PBIX file used this time below for your reference. In addition, you can learn about the current method of dynamically switching matrix headers through the following link:

Solved: Dynamically changing matrix column headers based o... - Microsoft Fabric Community

Solved: Dynamic Column Names for Matrix Visual using Slice... - Microsoft Fabric Community

Dynamic Column Headers in Power BI Customize with Inforiver

Best Regards

Jianpeng Li

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