When logging in directly to edit a page, the Pages view (Content tab > Pages) shows the available editable regions. The availability of regions for editing can be determined by templates and authority levels. Once a region is chosen for editing, the WYSIWYG editor toolbar is shown by default. For more information, please see WYSIWYG Editor Toolbar Reference.
Click on the arrow to the left or right to navigate frames to a different view. The arrows will move as you click on them, but they will always appear at the top of the page.
Navigating with the arrows expands or collapses a screen split.
In expanded site view the CMS shows the files and subdirectories for a directory and the Page Actions toolbar. The page actions include a comprehensive set of functions that can be performed on a page. Available functions are dependent upon whether the page is checked out or not (and other page states), and authority level. For more information, see Page Actions.
When expanded further, the Content > Pages view is shown. This is also the default view when clicking Content > Pages. For more information, see Content Pages View.