Two different packaging of Quark XPress:

for windows

for macintosh

WYSIWYG:

"is an acronym for what you see is what you get. The term is used in computing to describe a system in which content (text and graphics) displayed onscreen during editing appears in a form closely corresponding to its appearance when printed or displayed as a finished product, which might be a printed document, web page, or slide presentation."

-- Wikipedia, Link