How to format Column Header when using Display Parameter

Hi mbudiman ,

Thanks for reaching out to Microsoft Fabric Community.

As Ritaf1983  mentioned, Power BI currently does not support individual formatting for column headers in a matrix visual.

All formatting applied to the column header is uniform because the measures are combined into a single column element.

As an alternative, you can create separate measures for each value you want to display instead of using a Display Parameter. Add these measures individually to the matrix, which allows you to format each measure’s header independently using the Format pane’s Specific Column option, including background color, font color, or text colour. 

Another option is to use external or custom visuals, such as Inforiver Matrix, which offer more flexible header and cell formatting.

Similar discussion: Conditional formatting on column header in a matri... - Microsoft Fabric Community

You can also support by upvoting the existing community idea on conditional formatting for column headers or create a new idea if needed.

Existing Ideas: Epic idea: Row and column headers enhancements - Microsoft Fabric Community

Conditional formatting in column header matrix - Microsoft Fabric Community

Thanks Ritaf1983 for providing your valuable suggestions.

Hope this helps. Please reach out for further assistance.

Thank you.