How to change the font size inside the spinner?

To change the font size inside the spinner, you can inject custom CSS codes below and alter the size number according to your demand.

[data-type="input-spinner"] {

    font-size: 30px !important;

}

Below there is a guide showing how to inject the codes.

http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes. 

I hope this helps. 

Thanks.