Direction of page layout is called:

Page orientation defines the direction in which a document is displayed or printed. It determines whether the page is taller than it is wide (portrait) or wider than it is tall (landscape).

• Page Orientation is the correct and precise term for the direction of a page layout. It directly refers to the vertical or horizontal alignment of the content on a page.
• Page Setup is a broader category that encompasses various settings like margins, paper size, and orientation, but it is not the specific term for direction itself.
• Paper Layout is a general descriptive phrase and not the standard technical term.
• Format Style refers to the aesthetic appearance of text and elements, such as fonts, colors, and paragraph styles, not the physical direction of the page.