Marginalia in the context of "Cogito, ergo sum"

In typography, a margin is the area between the main content of a page and the page edges. The margin helps to define where a line of text begins and ends. When a page is justified the text is spread out to be flush with the left and right margins. When two pages of content are combined next to each other (known as a two-page spread), the space between the two pages is known as the gutter. (Any space between columns of text is a gutter.) The top and bottom margins of a page are also called "head" and "foot", respectively. The term "margin" can also be used to describe the edge of internal content, such as the right or left edge of a column of text.

Marks made in the margins are called marginalia.

An illuminated manuscript is a formally prepared document where the text is decorated with flourishes such as borders and miniature illustrations. Often used in the Roman Catholic Church for prayers and liturgical books such as psalters and courtly literature, the practice continued into secular texts from the 13th century onward and typically include proclamations, enrolled bills, laws, charters, inventories, and deeds.

The earliest surviving illuminated manuscripts are a small number from late antiquity, and date from between 400 and 600 CE. Examples include the Vergilius Romanus, Vergilius Vaticanus, and the Rossano Gospels. The majority of extant manuscripts are from the Middle Ages, although many survive from the Renaissance. While Islamic manuscripts can also be called illuminated and use essentially the same techniques, comparable Far Eastern and Mesoamerican works are described as painted.

An incunable or incunabulum (pl.: incunables or incunabula, respectively) is a book, pamphlet, or broadside that was printed in the earliest stages of printing in Europe, up to the year 1500. The specific date is essentially arbitrary, but the number of printed book editions exploded in the following century, so that all incunabula, produced before the printing press became widespread in Europe, are rare, where even some early 16th-century books are relatively common.

They are distinct from manuscripts, which are documents written by hand. Some authorities on the history of printing include block books from the same time period as incunabula, whereas others limit the term to works printed using movable type.

Armenian illuminated manuscripts (Armenian: Հայկական մանրանկարչություն, romanized: Haykakan manrankarch'owt'yown), form an Armenian tradition of formally prepared documents where the text is often supplemented with flourishes such as borders and miniature illustrations. They are related to other forms of Medieval Armenian art, Persian miniatures, and to Byzantine illuminated manuscripts. The earliest surviving examples date after the Golden Age of Armenian art and literature in the 6th century. Armenian illuminated manuscripts embody Armenian culture; they illustrate its spiritual and cultural values.

The most famous Armenian miniaturist, Toros Roslin, lived in the 13th century. The art form flourished in Greater Armenia, Lesser Armenia and the Armenian Diaspora. Its appearance dates back to the creation of the Armenian alphabet in Armenia, in the year 405 AD. Very few fragments of illuminated manuscripts from the 6th and 7th centuries have survived. The oldest fully preserved manuscript dates from the 9th century. Art experienced a golden age in the 13th and 14th centuries when the main schools and centers started to pop up (fifteen hundred centers of writing and illumination). The most striking are those of Syunik, Vaspurakan and Cilicia. Many Armenian illuminated manuscripts outside the country of Armenia have also survived the centuries. Despite the creation of the Armenian printing press in the 16th century, the production of miniatures continued until the 19th century and survives through modern Armenian painting and cinema.

A gloss is a brief notation, especially a marginal or interlinear one, of the meaning of a word or wording in a text. It may be in the language of the text or in the reader's language if that is different.

A collection of glosses is a glossary. A collection of medieval legal glosses, made by glossators, is called an apparatus. The compilation of glosses into glossaries was the beginning of lexicography, and the glossaries so compiled were in fact the first dictionaries. In modern times a glossary, as opposed to a dictionary, is typically found in a text as an appendix of specialized terms that the typical reader may find unfamiliar. Also, satirical explanations of words and events are called glosses. The German Romantic movement used the expression of gloss for poems commenting on a given other piece of poetry, often in the Spanish Décima style.