@s1pandey,
To understand your requirements, please describe more details or provide a screenshot.
The above solution is to format the values.
I want to customize the complete tooltip text.
@s1pandey,
I understood. Unfortunately, as I mentioned earlier, there is no way to customize the tooltips directly.
Tooltips are not stored in the presentation content. Applications can represent them in different ways. Please take a look at how LibreOffice shows the same tooltip: LibreOffice_tooltip.png (20.8 KB).