Optional areas have to be added first before they can accept components. They may also be removed again.

The mockups show how the edit bars of optional areas present themselves.

• the "add" button is used to add the optional area, "remove" to remove it again.
• the button hosting the destructive "remove" operation is to the left of the "new"/"edit" button pair and must be separated from them using whitespace.

Note that "add"/"remove" for adding and removing an optional area contrasts with "new"/"delete" for adding a new and deleting an existing component.