of, relating to, or noting a screen display that shows text exactly as it will appear in printed output, including underlining, various typefaces, as italics, line spacing, end-of-line breaks, and paragraph indentations.
noun
2.
a WYSIWYG display:
This program won't give you true WYSIWYG, but it does show boldface text and underlining.
(wĭz'ē-wĭg') Short for what you see is what you get. A word-processing or desktop publishing system in which text is displayed on a monitor exactly as it will be printed.