Change the Data Type of a Custom Field

You can modify the data type of a custom field. For example, you can change a field from Text to Text Area (Long).

Available in: both Salesforce Classic and Lightning Experience

Available in: all editions

Standard Objects are not available in Database.com

Salesforce Connect external objects are available in Developer Edition and, for an extra cost, in Enterprise, Performance, and Unlimited Editions.

User Permissions Needed
To change custom fields:	Customize Application

From the management settings for the field’s object, go to Fields.

For fields on Salesforce Knowledge article types, from Setup, enter Knowledge Article Types in the Quick Find box, select Knowledge Article Types, and then select an article type.
Click Edit next to the custom field you want to change.
Click Change Field Type.
Select a new data type and click Next.
Enter a field label, name, and any other attributes, and then save your changes.

Product Area