Answer: A
Correct answer: only how large the document appears on screen
Zoom changes only the magnification on screen. It alters nothing in the document itself - not the font size, not the margins, and not the printed output. That is worth being clear about, because it is the source of a common misunderstanding: a document viewed at 200 per cent is not printed twice the size. To change the printed size, the Scale to paper size option in the print settings is used, or the font and margins are altered. The control sits at the right of the status bar as a slider, and the Zoom dialogue on the View tab offers presets including Page Width, Text Width, Whole Page and Many Pages, the last of which is useful for checking the overall layout of a long document. Ctrl with the mouse wheel zooms in and out directly, which is the quickest method. Each document remembers its own zoom setting when saved.