After creating custom components, you can view, edit and delete them.
Required Editions
| Available in: Salesforce Classic and Lightning Experience |
| Available in: Contact Manager, Group, Professional, Enterprise, Performance, Unlimited, and Developer Editions |
| User Permissions Needed | |
|---|---|
| To create and edit custom components: | Customize Application |
From Setup, enter Components in the Quick Find box, then select Visualforce Components to display the Components list page, which shows the list of custom components defined for your organization. From this page you can:
- Click New to define a new custom component.
- Click a custom component name to display detailed information about the component.
-
Click Edit to modify a
component's name or markup.
Note A
icon indicates that a Visualforce custom
component is in an installed managed package. You can’t edit or
delete a Visualforce custom component in a managed package. A 
icon
indicates that a Visualforce custom component in a previously released
managed package will be deleted on the next package upload. You can choose
to undelete the Visualforce custom component through the package detail
page.
- Click Del to remove a custom component from your organization.
The namespace prefix is added to Apex classes and triggers, Visualforce components and pages, brand templates, folders, s-controls, static resources, web links, and custom report types if they are included in a managed package. However, if you don't have customize application permissions, the namespace prefix field is not displayed for brand templates, folders, and custom report types.