In order to create a new WordPress page, open the Add New section under Pages menu or click New > Page button at the top toolbar.
Add New page section has identical WYSIWYG text editor just like the Posts section has. Thus, the process of text input and formatting is the same.
You may also notice that Pages section does not have Tags and Categories meta-boxes. Instead, it has a box called Page Attributes. In this section, you can change the order of your pages and set parent pages. This is useful if you want to have several pages under one parent page.
