You can now copy any of the start pages in your interface. Click on the page from the left menu, and then click on the “Copy Page” link in the right column:
A new window will pop up where you can give the copied page a name:
Click “Save” and your new page will be copied into your interface. All views and child pages will also be copied with it.
Combined with the ability to re-use pages this can help save time when you start to work with many pages in your interface.