Hi Crystal,
Thank you for your post in our forum, we will try our best to help you if we can do something.
Per your description, I test on my end and find your problem may be related to the Border you selected. If you select No Border and None under Design, it means the border is none, so, the cell will show the original color— grey. While if you select None under Design but with all borders, it indicates your PivotTable is None format except for All Borders. **** You can see the below screenshots.
According to Apply or remove cell borders on a worksheet and test result, you can change the border to test whether your problem persists.
Meanwhile, you also can see Change the style of your PivotTable to create a new PivotTable Style to show the black border.
Hope this can help you. However, if your problem persists with trying all ways to change the borders, we would like to collect to help you troubleshoot further.
- The full screenshot of your Excel application. You can click File > Account > Product Information.
- Does the problem happen to all workbooks? How about creating a new workbook to test?
Best regards,
Cindy
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