Custom fields for the System
There we can provide some basic and necessary fields for the system to operate. Further fields which needs for your system. you need to create them and use it on its appropriate module. Creating the custom fields are available on the modules form itself. and here we have the option to modify or remove those custom fields from the system.To create Custom fields for the System, go to Setup > Display >Custom fields >Add New
Suppose if you created those fields and made some values in the custom fields. you are not allowed to remove those fields. So we strongly suggest you to try those fields, with prior needs and don't play with rough entries.
We still thinking to enhance the custom field to other possible modules in the system. And if you are looking the custom fields on any other missing modules, kindly let us know, so we will implement it immediately.