Understanding Form Layout Enhancement Upgrade Logic
When you preview custom forms, NetSuite performs a backend process that automatically applies form layout enhancements to the existing versions of the forms. These enhancements include the arrangement of fields into logical Field Groups and the standardization of Subtabs and Sublists.
The goal of the backend upgrade process is to create a form layout that is better organized and more consistent. The other goal is to upgrade the layout and maintain form customizations where ever possible.
See the following sections to learn about the NetSuite upgrade logic as it applies to custom forms, standard and custom fields, subtabs, and custom field record pages used to add or edit custom fields. These topics do not need to be read in order.
For information about field ordering as it applies to form upgrades, see Field Ordering.