ZFP - Enabling adding units, annotation strings and so on freely on overlay configuration

CWeb can add/edit some strings(units, annotation strings and so on) on the overlay by using GUI.

But ZFP doesn't have such function, so some Cweb user have complaint to replace it.

Actually we can do it by editing settings file directly, but it is no guarantee and hard for some customer.

Our application specialist raised some examples about it.