Am i able to add a table under the 42 metric visualization

I have the 42 metric showing a count,

I want to be able to press the little arrow button on the visulation to drop down and show a table of fields i have added. a, b, c ,d ,e, f ,g h...

currently it is only showing the field name and count.

but i want to add more fields.

That table is the "Spy panel". It isn't customizable. But you could add a corespondent data table, using the Data Table visualization next to it, with whatever fields you want.