Choosing to edit a page takes you to the page overview. At the top is an Add Page link, page chooser, page status and the rename and delete links. If you rename the page, you'll need to change any local links and reload any images added with CKEditor (If you uploaded to the folder created for that page, they'll be in the renamed folder). Deleting removes all folders and data for that page. This cannot be undone!
The Layout section has the layout number, preview and the layout change link. Page Content shows a preview of the page header, content and layout and an edit content link. The Gallery, Videos, Audio and Links sections have the settings, sort, add and Delete Checked links.