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How do I edit a pivot table in Excel?
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Edit a Pivot Table in Excel
1. Open your project in Excel.
2. Go to the spreadsheet that contains the data for the pivot table 
3. Add or change your data.
4. Go back to the pivot table tab.
5. Select your pivot table.
6. Click Analyze tab (Windows) or PivotTable Analyze (Mac).
7. Click Change Data Source.
8. Click Change Data Source.
9. Select your data.
10. Click Ok.
11. Click Refresh.