You cannot share pages between sites, but you can move a page to another site or copy and paste a page into another site.
To move or copy and paste a page:
Check the toolbar and verify that you are working in the correct project.
If your application has more than one site, verify that All Sites displays in the Sites field above the navigation tree.
If you want to move a page between sites, follow these steps:
If you want a copy of an existing page in another site, follow these steps: