Customise Tooltip for Decomposition Tree

Hi  jdavison,

Unfortunately, Power BI does not currently support customizing tooltips to appear only when hovering over the last field in the Explain By bucket of the Decomposition Tree. Tooltips in Power BI apply to the entire visual and cannot be conditionally triggered based on specific hierarchy levels within the Decomposition Tree.

If the feature is important for you, please create a post in
Fabric Ideas - Microsoft Fabric Community
The product team actively monitors the forum for valuable suggestions, and if a feature request gains enough support through community votes, they will consider implementing it in future updates.

If you find this post helpful, please mark it as an "Accept as Solution" and consider giving a KUDOS. Feel free to reach out if you need further assistance.
Thanks and Regards