zoom onzoom offzoom outzoom
zoom on turns zoom on for the current figure and prompts you to define the zoom center with the mouse:
zoom changes the axes limits by a factor of two (in or out). You can also click and drag to zoom into an area. Press the Return key to stop zooming.
zoom off turns zoom off.
zoom out zooms out fully.
zoom toggles zoom mode.
(c) Copyright 1994 by The MathWorks, Inc.