in typographical terms, what is an em? course hero

by Prof. Alize Dare 5 min read

What is an em in typography?

Unit of measurement in the field of typography. An em is a unit in the field of typography, equal to the currently specified point size. For example, one em in a 16-point typeface is 16 points. Therefore, this unit is the same for all typefaces at a given point size. The em dash (—) and em space ( ) are each one em wide.

What is an example of em in math?

Typographic measurements using this unit are frequently expressed in decimal notation (e.g., 0.7 em) or as fractions of 100 or 1000 (e.g., 70/100 em or 700/1000 em). The name em was originally a reference to the width of the capital M in the typeface and size being used, which was often the same as the point size.

What is the difference between EM and C in a letter?

The line height, c, is the precursor of the em. In metal type, the point size (and hence the em) was equal to the line height of the metal body from which the letter rises. In metal type, the physical size of a letter could not normally exceed the em.

Why is the character called an em dash?

The character is called an em dash because it is 1 em wide, a length that varies depending on the font size. Speculative reason: As for why the M and N where selected as models for these units, that's probably just a matter of circumstances and naming convention.

What is EM in typesetting?

An em is a unit of measurement, relative to the size of the font; therefore, in a typeface set at a font-size of 16px, one em is 16px. The em square is the “box” that each glyph is sized relative to. So, at 12 points, the em square is 12 points wide.

What are the 3 types of typography?

There are three general styles you'll find with many typefaces: italic, oblique, and small caps. Small caps are often used for headings or subheadings, to add variety to your typography if using a single typeface. Italic and oblique are often confused or used interchangeably, but are two distinct styles.

What are typographical words?

“A collection of letters, numbers, punctuation, and other symbols used to set text (or related) matter.

What is a typographical element?

Type design may be intimidating to many, with terms such as leading, baseline, kerning, ascender, tail, and many more … The good news is, there are eight basic, universal typographical design elements: typeface, hierarchy, contrast, consistency, alignment, white space, and color.

What is typography example?

For example Garamond, Times, and Arial are typefaces. Whereas font is a specific style of typeface with a set width, size, and weight. For example, Arial is a typeface; 16pt Arial Bold is a font. So typeface is the creative part and font is the structure.

How many types of typography are there?

Typography Basics There are five basic classifications of typefaces: serif, sans serif, script, monospaced, and display.

What are some common terms of typography?

Common Terms Found in TypographyAperture. The negative space that is partially enclosed in some characters such as the lower part of a lowercase e or a c.Apex. The top point of a character where two strokes meet as seen on an uppercase A.Arc. ... Ascender. ... Ball Terminal. ... Baseline. ... Body. ... Bowl.More items...•

What are the rules of typography?

7 Typography Rules for beginnersDefine clear entry points.Line length (measure)Alignment carefully.Apply Visual space on Block of Text.Pairing fonts wisely.Hanging Punctuation.All Caps.

What is typography simple words?

typography, the design, or selection, of letter forms to be organized into words and sentences to be disposed in blocks of type as printing upon a page.

What is typography in elements of design?

At the basic level, typography is the art that involves arranging a typeface in various combinations of font, size, and spacing. In this way, a wide range of designs including website design, brochure designs, print design, books, and computer graphics, etc.

What are the 5 typography components?

Elements of typographyFonts and typefaces. A font is a set of characters of a single size, width, and style. ... Kinds of typeface. Serif, sans-serif, script, and decorative are the four basic types of typefaces.Leading, kerning, and tracking. ... Color. ... Hierarchy. ... Consistency. ... White space.

What is an EM in typography?

An em is a unit in the field of typography, equal to the currently specified point size. For example, one em in a 16-point typeface is 16 points. Therefore, this unit is the same for all typefaces at a given point size.

What is the EM in printing?

One em was traditionally defined as the width of the capital ' M ' in the current typeface and point size, because the 'M' was commonly cast the full-width of the square blocks, or em-quads (also mutton-quads ), which are used in printing presses .

Where is the letter M?

The letter M, on the left in Perpetua and on the right in Calisto, inside squares of one em on each side . Although the size of the em ultimately depends on the point size, or height of the metal body of a letter, it is also used as a measure of horizontal spacing relative to the type size, with vertical spacing being measured in picas or points.

What is the REM in a document?

The rem, or root em, is the font size of the root element of the document. Unlike the em, which may be different for each element, the rem is constant throughout the document.

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Overview

An em is a unit in the field of typography, equal to the currently specified point size. For example, one em in a 16-point typeface is 16 points. Therefore, this unit is the same for all typefaces at a given point size.
The em dash — and em space   are each one em wide.
Typographic measurements using this unit are frequently expressed in decimal notation (e.g., 0.…

History

In metal type, the point size (and hence the em) was equal to the line height of the metal body from which the letter rises. In metal type, the physical size of a letter could not normally exceed the em.
In digital type, the em is a grid of arbitrary resolution that is used as the design space of a digital font. Imaging systems, whether for screen or for print, work …

Incorrect and alternative definitions

Although the size of the em ultimately depends on the point size, or height of the metal body of a letter, it is also used as a measure of horizontal spacing relative to the type size, with vertical spacing being measured in picas or points. One em was traditionally defined as the width of the capital 'M' in the current typeface and point size, because the 'M' was commonly cast the full-width of the squar…

CSS

In Cascading Style Sheets, the em unit is the height of the font in nominal points or inches. The actual, physical height of any given portion of the font depends on the user-defined DPI setting, current element font-size, and the particular font being used.
To make style rules that depend only on the default font size, another unit was developed: the rem. The rem, or root em, is the font size of the root element of the document. Unlike the em, wh…

See also

• Em dash (—)
• En (typography)
• Fullwidth forms
• List of XML and HTML character entity references
• Non-breaking space width variations

External links

• CSS Length and Units
• CSS Units and Values
• The amazing em unit and other best practices
• An EM calculator/converter