Adding a push button on 'CAT2 -Data entry view'

Hi ,

I would need to know if we can make use of any customer exit to add push button on data entry view.

I know that SAP has already provided a 'Additional fields' push button to add custom fields.

But in case we need to have a seperate push button.

I know all the customer exits available with CAT2 and replies with that exit names are not needed.

Please let me know a specific solution in case you would have had any exp in it.

Thanks!