Hello,
You are using "number" componants to display your KPI's. It is frustrating, but there is no way, to my knowledge, to reduce size more than you did with such componants.
If all your figures are coming from the same table, you may want to use a "List" or a "Grid" componant instead.
Using a list for example, you will have the possibility to set line heigths as small, medium or large depending on the number of row to be displayed.
Regards,
Pascal