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-<head>
-<title>UK TeX FAQ -- question label WYGexpts</title>
-</head><body>
-<h3>The TeX document preparation environment</h3>
-<p/>&#8220;<a href="FAQ-notWYSIWYG.html">Why TeX is not WYSIWYG</a>&#8221;
-outlines the reasons (or excuses) for the huge disparity of user
-interface between &#8220;typical&#8221; TeX environments and commercial word
-processors.
-<p/>Nowadays, at last, there is a range of tools available that try either
-to bridge or to close the gap. One range modestly focuses on
-providing the user with a legible source document. At the other
-extreme we have <a href="http://www.texmacs.org"><i>TeXmacs</a></i>,
-a document processor using
-TeX&#8217;s algorithms and fonts for both editor display and printing.
-<i>TeXmacs</i> does not use the TeX
-language itself (though among other formats, LaTeX may be exported
-and imported). A bit closer to LaTeX is
-<a href="http://www.lyx.org/">LyX</a>, which has its own
-editor display and file formats as well, but does its print output by
-exporting to LaTeX. The editor display merely resembles the
-printed output, but you have the possibility of entering arbitrary
-LaTeX code. If you use constructs that LyX does not
-understand, it will just display them as source text marked red, but
-will properly export them.
-<p/>Since a lot of work is needed to create an editor from scratch that
-actually is good at editing (as well as catering for TeX), it is
-perhaps no accident that several approaches have been implemented
-using the extensible <i>emacs</i> editor. The low end of the
-prettifying range is occupied by syntax highlighting: marking TeX
-tokens, comments and other stuff with special colours.
-Many free editors (including <i>emacs</i>) can cater for TeX in
-this way. Under Windows, one of the more popular editors with such
-support is the
-Shareware product <a href="http://www.winedt.com/"><i>winedt</a></i>.
-Continuing the range of
-tools prettifying your input, we have the <i>emacs</i> package
-<a href="http://x-symbol.sourceforge.net"><i>x-symbol</a></i>, which does
-the WYSIWYG part of its work by replacing single TeX tokens and
-accented letter sequences with appropriate-looking characters on the
-screen.
-<p/>A different type of tool focuses on making update and access to
-previews of the typeset document more immediate. A recent addition
-in several viewers, editors and TeX executables are so-called
-&#8216;source specials&#8217; for cross-navigation. When TeX compiles a
-document, it will upon request insert special markers for every input
-line into the typeset output. The markers are interpreted by the DVI
-previewer which can be made to let its display track the page
-corresponding to the editor input position, or to let the editor jump
-to a source line corresponding to a click in the preview window.
-<p/>An <i>emacs</i> package that combines this sort of editor movement
-tracking with automatic fast recompilations (through the use of dumped
-formats) is
-<a href="http://pauillac.inria.fr/whizzytex/"><i>WhizzyTeX</a></i>
- which is best used with a previewer by the
-same author.
-<p/>Another <i>emacs</i> package called
-<a href="http://preview-latex.sourceforge.net"><i>preview-latex</a></i>
-tries to solve
-the problem of visual correlation between source and previews in a
-more direct way: it uses a LaTeX package to chop the document source
-into interesting fragments (like figures, text or display math) which
-it runs through LaTeX and replaces the source text of those
-fragments with the corresponding rendered output images. Since it
-does not know about the structure of the images, at the actual cursor
-position the source text is displayed while editing rather than the
-preview. This approach is more or less a hybrid of the source
-prettifying and fast preview approaches since it works in the source
-buffer but uses actual previews rendered by LaTeX.
-<p/>A more ambitious contender is called TeXlite. This
-system is only available on request from its author;
-it continuously updates its screen with the help of a special version
-of TeX dumping its state in a compressed format at each page and
-using hooks into TeX&#8217;s line breaking mechanism for reformatting
-paragraphs on the fly. That way, it can render the output from the
-edited TeX code with interactive speed on-screen, and it offers the
-possibility of editing directly in the preview window.
-<p/>That many of these systems occupy slightly different niches can be
-seen by comparing the range of the
-<i>emacs</i>-based solutions ranging from syntax highlighting to instant
-previewing: all of them can be activated at the same time without
-actually interfering in their respective tasks.
-<p/>The different approaches offer various choices differing in the
-immediacy of their response, the screen area they work on (source or
-separate window), degree of correspondence of the display to the final
-output, and the balance they strike between visual aid and visual
-distraction.
-<dl>
-<dt><tt><i>preview-latex</i></tt><dd>Distributed as part of <a href="http://mirror.ctan.org/support/auctex">support/auctex</a>; <a href="http://mirror.ctan.org//help/Catalogue/entries/preview-latex.html">catalogue entry</a>
-<dt><tt><i>texmacs</i></tt><dd>Browse <a href="http://mirror.ctan.org/systems/unix/TeXmacs">systems/unix/TeXmacs</a>; <a href="http://mirror.ctan.org//help/Catalogue/entries/texmacs.html">catalogue entry</a>
-</dl>
-<p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=WYGexpts">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=WYGexpts</a>
-</body>