In addition to creating a new custom folder view as described in Section 8.2, Creating a New Custom Folder View, you can create a custom folder by modifying an existing folder view.
In the folder or workspace where the custom folder view was previously defined, click Folder > Form/View Designers.
The Form and View Designers page is launched.
Expand Folder Views, then click the custom folder view that you want to modify.
Continue with Section 8.2.2, Adding Elements to the Folder Add/Modify Form.