Optionally, define custom help text for the field.
For lookup and master-detail relationship fields, optionally define a lookup filter.
For formula fields, click Next to modify the formula.
In Enterprise, Unlimited, Performance, and Developer Editions, click Next to set the field-level security for the field.
Editing fields may require changing a large number of records at once. To process these changes efficiently, your request may be queued and you may receive an email notification when the process has completed.
To customize the way a custom object’s related list appears on a parent record’s detail page, edit the parent record’s page layout. For example, if you want to edit which fields appear on a custom object’s related list on accounts, you would edit the account page layout.
You cannot change the Field Name if a custom field is referenced in Apex.
When editing fields for accounts, opportunities, cases, contacts, or custom objects, check for any criteria-based sharing rules that use the field in the rules. A field change may affect which records are shared.