Restricting the values in Drop Down list for ESS application

Hello Experts,

We are trying to restrict the values in the drop down list box for payment method field for direct deposit iview.

Here Payment is the Zlsch field.

here we are trying to have only 3 vlaues in the drop down. Do I have to do it from java code or can this be restricted on the ECC side?

Plese let me know.

Thanks,

James.