docs/docs.user.customize.custom

{ "_label": "Custom Field" }

A very common customization is adding of custom fields. You can add Custom Fields in any Master or Transaction in ERPNext. To add a Custom Field, go to:

Setup > Custom Field > New Custom Field

In the form:

Select the Document on which you want to add the Custom Field.
Select the Type of field and the Options (see section on field types).
Select where you want to field to appear in the Form (“after field” section).

and save the Custom Field. When you open a new / existing form of the type you selected in step 1, you will see it with the Custom Fields.

Naming

Many times you want your fields to be carried over from one form to another. For example, you may have added a Custom Field in Quotation that you want to include in Sales Order when a Sales Order is created from the Quotation. This is simple in ERPNext, just make sure the fields have the same “fieldname”