On focus textbox for multi-row card

Hi there,

I'm creating a report with a multi-row card containing indexes and labels for which it would be helpful to support the reader with a more extended definition.

I was thinking about an on-focus textbox: e.g. in the card there is a label "CPI"; when the mouse pointer flies on "CPI", it appears a textbox with the extended description "CPI stands for Cost Performance Index and it represents bla bla bla".

At the moment the on-focus works repeating exactly the name of the field. I also tried to put some description in the field properties box, but with no success.

Thanks for your help!