Everything about Underline totally explained
An
underline, also called an
underscore, is one or more horizontal lines immediately below a portion of
writing. Single, and occasionally double ("double-underscore"), underlining was originally used in hand-written or
typewritten documents to emphasise text. In a
manuscript to be
typeset, various forms of underlining were conventionally used to indicate that text should be set in a special
typeface such as
italics to show
emphasis, part of a procedure known as
markup. With the advent of
word processing, different typefaces can be used in the manuscript directly, so that underlining is no longer needed for markup; but underlining is sometimes used in documents in its own right.
Underlines are sometimes used as a
diacritic, to indicate that a letter has a different pronunciation to its non-underlined form.
Use with computers
In
web browsers, default settings typically distinguish
hyperlinks by underlining them (and usually changing their color), but both users and websites can change these settings to make some or all hyperlinks appear differently (or even without distinction from normal text).
The
HTML special inline element , denoting inserted text, is often presented as underlined text. HTML also has a
presentational element , denoting underlined text; this is
deprecated in favour of the
CSS style
. These elements may also exist in other
markup languages, such as
MediaWiki.
In
plain-text (
ASCII) computer files, including
e-mail communication, where underlining isn't possible, it's often indicated by surrounding words with
underscore characters. For example, "You must use an _emulsion_ paint on the ceiling".
Unicode has the
combining diacritic "combining low line" at U+0332 ̲ that results in an underline when run together: u̲n̲d̲e̲r̲l̲i̲n̲e̲. Not to be confused is the
combining macron below.
Underline (typically red and/or wavy) is often used by
spell checkers (and
grammar checkers) to denote misspelled or otherwise incorrect text.
Underlines in non-Latin scripts
In
Chinese, the underline is a punctuation mark for proper names (專名號, 专名号;
pinyin: zhuānmínghào; literally “
proper name mark”, used for personal and geographic names). Its meaning is somewhat akin to capitalization in English and should never be used for emphasis; however, due to the influence of English computing, the underline is now sometimes used for emphasis. A wavy underline (書名號, 书名号;
pinyin: shūmínghào; literally “
book title mark”) serves a similar function, but marks names of literary works instead of proper names.
In the case of two or more adjacent proper names, each individual proper name is separately underlined, so there should be a slight gap between the underlining of each proper name.
Manuscripts
The following kinds of underlines are used on
manuscripts to indicate special
typefaces to be used.
Further Information
Get more info on 'Underline'.
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