When you click on the green + button as shown in the previous image, you will take to this screen which provides complete details about the pages, posts, categories, tags, format and picture tag.
Once you get to this step, you have complete picture of your pages, the item id, title, item slug, author and publish date too. This is quite handy as you get all the details in one single interface. No going back and forth to check stuff.
Add a new page
Use the Add New Page button to add the new page to your list and menu.When you click on Add New Page, you are taken to this screen. Name your page including the author slug,template and you can Add and edit page/post that you want. Next, click on Add New Page.