A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi IG,
You will find Custom option to enter specific value in Add Chart Element-> More Error Bars Options.
Here is my test result in Excel for Mac:
You can check whether you can see this option in Chart Element. If you still don’t have this option, please provide the screenshots if it and the screenshot of your Excel -> About Excel page. We will provide further help.
Best Regards,
Ivy