Pageside

Pageside is a term with no single, universally accepted definition, and its meaning varies across contexts. In traditional publishing, the closest concept is the distinction between the right-hand and left-hand pages when a book is open. Recto refers to the right-hand page and verso to the left-hand page. The phrase pageside is rarely used in formal typography references and is more often found in informal notes or diagrams indicating which side of a page is being discussed. In binding and layout workflows, people may speak of page side margins or the page-facing side, but these usages are not standardized.

In computing and digital design, pageside may appear as a variable, property, or UI component name in certain frameworks or documentation to describe elements positioned along the edge of a page, such as a side navigation rail, a collapsible sidebar, or a page metadata pane. Because it is not part of a universal specification, its exact meaning depends on the tool or project. Designers typically prefer terms like left page, right page, recto, verso, sidebar, or gutter to convey the same ideas more clearly.

Etymology and usage notes: pageside is a compound of page and side and is predominantly informal and context-dependent. See also: recto, verso, page layout, typography, user interface, sidebar.