Guide

1. Open your Power BI desktop, go to the 'Home' tab, and select 'Blank report'.

2. Select a data source to add data to your report.

3. Click 'Load'.

4. Click the table icon on the left panel.

5. In the top ribbon, click 'New Column'.

6. A formula bar appears where you can write your DAX expression.

7. Click the check icon to commit and apply the formula.

8. Power BI will add the new column to your table. You can now use it in visuals.