Then you can edit the shapes in the background layer as in the normal view.
Open the Backgrounds library if it's not already open. (On the Libraries menu, point to Predefined Symbols, point to General, and then click Backgrounds.)
Drag a background shape onto your page.
You can edit the predefined backgrounds or edit a blank background.
On the View menu, click the Background View button.
Then you can edit the shapes in the background layer as in the normal view.
After you finish the edit, click the Normal View button to switch to the normal view.