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WYSIWYG (// WIZ-ee-wig) is an acronym for "what you see is what you get". In computing, a WYSIWYG editor is a system in which content (text and graphics) can be edited in a form closely resembling its appearance when printed or displayed as a finished product, such as a printed document, web page, or slide presentation.
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WYSIWYG implies a user interface that allows the user to view something very similar to the end result while the document is being created. In general, WYSIWYG implies the ability to directly manipulate the layout of a document without having to type or remember names of layout commands. The actual meaning depends on the user's perspective, e.g.
- In presentation programs, compound documents, and web pages, WYSIWYG means the display precisely represents the appearance of the page displayed to the end-user, but does not necessarily reflect how the page will be printed unless the printer is specifically matched to the editing program, as it was with the Xerox Star and early versions of the Apple Macintosh.
- In word processing and desktop publishing applications, WYSIWYG means that the display simulates the appearance and represents the effect of fonts and line breaks on the final pagination using a specific printer configuration, so that, for example, a citation on page 1 of a 500-page document can accurately refer to a reference three hundred pages later.
- WYSIWYG also describes ways to manipulate 3D models in stereo-chemistry, computer-aided design, and 3D computer graphics.
Modern software does a good job of optimizing the screen display for a particular type of output. For example, a word processor is optimized for output to a typical printer. The software often emulates the resolution of the printer in order to get as close as possible to WYSIWYG. However, that is not the main attraction of WYSIWYG, which is the ability of the user to be able to visualize what they are producing.
In many situations, the subtle differences between what the user sees and what the user gets are unimportant. In fact, applications may offer multiple WYSIWYG modes with different levels of "realism", including
- A composition mode, in which the user sees something somewhat similar to the end result, but with additional information useful while composing, such as section breaks and non-printing characters, and uses a layout that is more conducive to composing than to layout.
- A layout mode, in which the user sees something very similar to the end result, but with some additional information useful in ensuring that elements are properly aligned and spaced, such as margin lines.
- A preview mode, in which the application attempts to present a representation that is as close to the final result as possible.
Before the adoption of WYSIWYG techniques, text appeared in editors using the system standard typeface and style with little indication of layout (margins, spacing, etc.). Users were required to enter special non-printing control codes (now referred to as markup code tags) to indicate that some text should be in boldface, italics, or a different typeface or size. In this environment there was very little distinction between text editors and word processors.
These applications typically used an arbitrary markup language to define the codes/tags. Each program had its own special way to format a document, and it was a difficult and time-consuming process to change from one word processor to another.
The use of markup tags and codes remains popular today in some applications due to their ability to store complex formatting information. When the tags are made visible in the editor, however, they occupy space in the unformatted text and so disrupt the desired layout and flow.
Bravo, a document preparation program for the Alto produced at Xerox PARC by Butler Lampson, Charles Simonyi and colleagues in 1974, is generally considered the first program to incorporate WYSIWYG technology, displaying text with formatting (e.g. with justification, fonts, and proportional spacing of characters). The Alto monitor (72 PPI) was designed so that one full page of text could be seen and then printed on the first laser printers. When the text was laid out on the screen, 72 PPI font metric files were used, but when printed 300 PPI files were used—thus one would occasionally find characters and words slightly off, a problem that continues to this day. (72 PPI came from a new measure of 72 "PostScript points" per inch. Prior to this, the standard measure of 72.27 points per inch was used in typeface design, graphic design, typesetting and printing.)
In parallel with but independent of the work at Xerox PARC, Hewlett Packard developed and released in late 1978 the first commercial WYSIWYG software application for producing overhead slides or what today are called presentation graphics. The first release, named BRUNO (after an HP sales training puppet), ran on the HP 1000 minicomputer taking advantage of HP's first bitmapped computer terminal the HP 2640. BRUNO was then ported to the HP-3000 and re-released as "HP Draw".
By 1981 MicroPro advertised that its WordStar word processor had WYSIWYG, but its display was limited to displaying styled text in WYSIWYG fashion; bold and italic text would be represented on screen instead of surrounded by tags or special control characters. In 1983 the Weekly Reader advertised its Stickybear educational software with the slogan "what you see is what you get", with photographs of its Apple II graphics, but home computers of the 1970s and early 1980s lacked the sophisticated graphics capabilities necessary to display WYSIWYG documents, meaning that such applications were usually confined to limited-purpose, high-end workstations (such as the IBM Displaywriter System) that were too expensive for the general public to afford. Towards the mid-1980s, however, things began to change. Improving technology allowed the production of cheaper bitmapped displays, and WYSIWYG software started to appear for more popular computers, including LisaWrite for the Apple Lisa, released in 1983, and MacWrite for the Apple Macintosh, released in 1984.
The Apple Macintosh system was originally designed so that the screen resolution and the resolution of the ImageWriter dot-matrix printers sold by Apple were easily scaled: 72 PPI for the screen and 144 DPI for the printers. Thus, the scale and dimensions of the on-screen display in programs such as MacWrite and MacPaint were easily translated to the printed output—if the paper were held up to the screen, the printed image would be the same size as the on screen image, but at a higher resolution. As the ImageWriter was the only model of printer physically compatible with the Macintosh printer port, this created an effective, closed system. Later, when Macs using external displays became available, the resolution was fixed to the size of the screen to achieve 72 DPI. These resolutions often differed from the VGA-standard resolutions common in the PC world at the time. Thus, while a Macintosh 15" monitor had the same 640x480 resolution as a PC, a 16" screen would be fixed at 832x624 rather than the 800x600 resolution used by PCs. With the introduction of third-party dot-matrix printers as well as laser printers and multisync monitors, resolutions deviated from even multiples of the screen resolution, making true WYSIWYG harder to achieve.
The phrase "what you see is what you get", from which the acronym derives, was a catchphrase popularized by Flip Wilson's drag persona Geraldine, first appearing in September 1969, then regularly in the early 1970s on The Flip Wilson Show. The phrase was a statement demanding acceptance of Geraldine's entire personality and appearance.
As it relates to computing, there are multiple claims to first use of the phrase:
- In mid-1975, John W. Seybold, the founder of Seybold Publications, and researchers at PARC, incorporated Gypsy software into Bravo to create Bravo 3, which allowed text to be printed as displayed. Charles Simonyi and the other engineers appropriated Flip Wilson's popular phrase around that time.
- Barbara Beeton reports that the term was coined by Bill Tunnicliffe in a presentation at a 1978 committee meeting involving the Graphic Communications Association (GCA), the American Mathematical Society (AMS), and the Printing Industries of America (PIA).
- The phrase was coined in 1982 by Larry Sinclair, an engineer at Information International, Inc. ("Triple I") to express the idea that what the user sees on the screen is what the user gets on the printer while using the "page layout system", a pre-press typesetting system first shown at ANPS in Las Vegas.[when?]
Because designers of WYSIWYG applications typically have to account for a variety of different output devices, each of which has different capabilities, there are a number of problems that must be solved in each implementation. These can be seen as tradeoffs between multiple design goals, and hence applications that use different solutions may be suitable for different purposes.
Typically, the design goals of a WYSIWYG application may include the following:
- Provide high-quality printed output on a particular printer
- Provide high-quality printed output on a variety of printers
- Provide high-quality on-screen output
- Allow the user to visualize what the document will look like when printed
- Allow the user to visualize what the website will look like when published 
It is not usually possible to achieve all of these goals at once.
The major problem to be overcome is that of varying output resolution. As of 2016, monitors typically have a resolution of between 102 and 125 pixels per inch. Printers generally have resolutions between 240 and 1440 pixels per inch; in some printers the horizontal resolution is different from the vertical. This becomes a problem when trying to lay out text; because older output technologies require the spacing between characters to be a whole number of pixels, rounding errors will cause the same text to require different amounts of space in different resolutions.
Solutions to this include the following:
- Always laying out the text using a resolution higher than the user is likely to use in practice. This can result in poor quality output for lower resolution devices (although techniques such as spatial anti-aliasing may help mitigate this), but provides a fixed layout, allowing easy user visualisation. This is the method used by Adobe Acrobat.
- Laying out the text at the resolution of the printer on which the document will be printed. This can result in low quality on-screen output, and the layout may sometimes change if the document is printed on a different printer (although this problem occurs less frequently with higher resolution printers, as rounding errors are smaller). This is the method used by Microsoft Word.
- Laying out the text at the resolution of a specific printer (in most cases the default one) on which the document will be printed using the same font information and kerning. The character positions and number of characters in a line are exactly similar to the printed document.
- Laying out the text at the resolution for the output device to which it will be sent. This often results in changes in layout between the on-screen display and printed output, so is rarely used. It is common in web page designing tools that claim to be WYSIWYG, however.
Other problems that have been faced in the past include differences in the fonts used by the printer and the on-screen display (largely solved by the use of downloadable font technologies like TrueType) and differences in color profiles between devices (mostly solved by printer drivers with good color model conversion software).
Apart from these issues, the practice of WYSIWYG itself has been condemned as distracting from the writing process.
Many variations are used only to illustrate a point or make a joke, and have very limited real use. Some that have been proposed include the following:
- WYSIAWYG; what you see is almost what you get, similar to WYSIMOLWYG.
- WYSIAYG, what you see is all you get, used to point out that advanced users are sometimes limited by the user interface.
- WYGIWYG; what you get is what you get, often used in a similar way to WYSIAYG, WYSIMOLWYG, or WYSINWYW.
- WYSIMOLWYG, what you see is more or less what you get, recognizing that most WYSIWYG implementations are imperfect.
- WYSINWYW, what you see is not what you want, suggesting that Microsoft Word often controls the user, not the other way around
- WYSIWYM, what you see is what you mean (The user sees what best conveys the message.)
- WYCIWYG, what you cache is what you get. "wyciwyg://" turns up occasionally in the address bar of Gecko-based Web browsers such as Mozilla Firefox when the browser is retrieving cached information. Unauthorized access to wyciwyg:// documents was fixed by Mozilla in Firefox version 188.8.131.52.
- WYGIWYS, what you get is what you see, used in computing to describe an interaction paradigm in results-oriented user interface. The term was used by Jakob Nielsen to describe Microsoft Office 2007's "Ribbon" interface
- WYSIWYN, what you see is what you need relates to Software, which is not composed through the interconnection of modules, but work with such a detailed user and rights management, that users can see only what they really need.
- WYSYHYG, what you see you hope you get (/ˈwɪzihɪɡ/), a term ridiculing text mode word processing software; used in the Microsoft Windows video collection, a video distributed around 1991 on two VHS cassettes at promotional events.
- WYSIPWYG, what you see is probably what you get, relates to html and markup editors where code and macro tags sort of show what the result will eventually be. This type of WYSIWYG view is hard to render while editing so the user can only guess at the outcome.
- WYSIWYS, what you see is what you sign, an important requirement for digital signature software. It means that the software has to be able to show the user the content without any hidden content before the user signs it.
- WYSIWYD, what you see is what you deserve refers to the ability of the user and – of course – their effort to create something worthwhile.
- WYSIWYW, what you see is what you want, used to describe GNU TeXmacs editing platform. The abbreviation clarifies that unlike in WYSIWYG editors, the user is able to customize WYSIWYW platforms to partly act as manual typesetting programs such as TeX or troff.
- YAFIYGI, you asked for it you got it, used to describe a text-command oriented document editing system that does not include WYSIWYG, in reference to the fact that users of such systems often ask for something they did not really want. It is considered to be the opposite of WYSIWYG. The phrase was first used in this context in 1983 in the essay Real Programmers Don't Use Pascal to describe the TECO text editor system, and began to be abbreviated circa 1993.
- WISIWIT, what I see is what I type, also used to describe text-oriented editing systems in the opposite sense of WYSIWYG.
- Comparison of HTML editors
- Does exactly what it says on the tin
- Plain text
- Tableless web design
- List of HTML editors
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|Look up WYSIWYG or what you see is what you get in Wiktionary, the free dictionary.|
- The Jargon File entry for WYSIWYG
- What has WYSIWYG done to us? – Critical paper about the negative effects the introduction of WYSIWYG has had as of 1996.
- XML: WYSIWYG to WYSIWYM – A brief look at XML document authoring An article on existing XML authoring software (May 2005)
- ATPM.com's WYSIWYG: Is it What You Want?