When reading a document you can hide all of the toolbars and panes to enhance the reading experience. To enable reading mode go to View > Reading Mode or use the shortcut key Ctrl + Shift + H (Cmd + Shift + H on the Mac)
Note: This mode will not fill the entire screen as the main toolbar will still be shown. To cover as much of the screen as possible make sure to maximize the PDF Studio window.
Once reading mode is enable Navigating the document using the keyboard or mouse works as it normally would. In addition you can use the left and right arrows that are displayed in reading mode to navigate to the next and previous pages.