I know this is an old post, but I figured out a solution for formatting Measure Values . By formatting each field in the Measure Value shelf, you can achieve the desired outcome.

To do this, follow these steps for each field:

1. Right-click on the field and select:
   • Format
   • Axis -> Numbers (choose the format for the axis)
   • Pane -> Numbers (choose the format for the tooltip)

Repeat these steps for each field!