Default DAX Parameter Values

Hi lbendlin ,thanks for the quick reply, I'll add more.

Hi PatrickGreen ,

If I understand correctly, when the slicer selects "Month", create a bookmark. Then insert a button and bind the button to the previous bookmark. For details, please refer to the following article

Create report bookmarks in Power BI to share insights and build stories - Power BI | Microsoft Learn

Best Regards,
Wenbin Zhou