There are two main ways to format PivotTable headers and data labels in Excel:

1. Using the PivotTable Analyze Tab:

1. Click anywhere within your PivotTable to activate the PivotTable Analyze tab on the ribbon.
2. Formatting Headers:
- In the Active Field group, click Field Settings.
- In the Field Settings dialog box, choose the header you want to format (Row Labels or Column Labels).
- Click the Number Format button at the bottom.
- Select the desired format from the Format Cells dialog box (e.g., currency, percentages, date format).
- Click OK twice to close the dialog boxes.
3. Formatting Data Labels:
- Right-click on a data label within your PivotTable.
- Select Number Format from the context menu.
- Choose the desired format from the Format Cells dialog box.
- Click OK to close the dialog box.

2. Using Conditional Formatting:

1. Select the cells containing the data labels you want to format.
2. Go to the Home tab on the ribbon.
3. Click on Conditional Formatting in the Styles group.
4. Choose the desired formatting rule based on your needs (e.g., Highlight Cells Rules, Data Bars).
5. Define the specific criteria for applying the formatting to your data labels.
6. Click OK to apply the conditional formatting.

Additional Tips:

* You can also format the font, size, and alignment of headers and data labels using the options within the PivotTable Analyze tab or the Home tab's formatting options.
* To format all headers or data labels at once, ensure you select the entire row/column containing those elements before applying formatting.
* Consider using PivotTable styles for a quick and consistent formatting approach across your entire table.