Here you can select customized fields which are not available in the program by default but which you require for certain Websites.
Click Add and enter the name of the wished field into the dialog box that opens.
Click OK to accept the field.
You can now add as many fields as you like. To delete a field, select the corresponding field and click Delete; to delete all items, click Clear.
To rename a field, select the corresponding field and click Rename.