Matrix Tool tip dimension atributes

Hello!

In a matrix tooltip, I have setup as automatic page, and for the measures within the tooltip, I am getting what I want.   However, for the 1st column (dimension), I would like to include additional attributes

The screenshot below, 1st example CenterID is included as a measure, and the resulting tooltip includes this value.  The bottom half of this example, I would like to remove the measure from matrix, and only include when hovering over the row dimension.  Header '14.."

I think some of my challenge is not finding a tooltip well within the matrix visual?

I would only like to see the CenterID when hovering over the Common Description data field.   Leaving as a measure only eats up valuable space  Thank you