A single-project composition layout is restricted to the project in which it was created. Your method for accessing a composition layout for editing is determined by your Show Tab in Project Window setting in the Advanced Layout Properties dialog box. When you check Show Tab in Project Window, you can access the composition layout from the layout tab at the top of the project window. Simply click the tab to activate the composition layout for editing content and layout attributes.

If you don’t check Show Tab in Project Window, you have to select the Item tool and double click the original Composition Zones item. The composition layout displays.

For a composition layout created from an entire layout, check Show Tab in Project Window in the Advanced Layout Properties dialog box so you can access the layout easily. Otherwise, you have to select the composition layout in the Shared Content palette, click Edit, and then check Show Tab in Project Window.