There’s a new feature in the Mac OS X 10.4.8 Keyboard & Mouse’s “Mouse” System Preferences panel: “Zoom using scroll wheel.” The same feature is also available for trackpad users who have the “Use two fingers to scroll” option turned on,” John Gruber notes for Daring Fireball.
The new feature is “on” by default, with the “Zoom using scroll ball while holding” modifer key set to the “Control” key (you can change this key if you like).
(Note: Some Daring Fireball readers report seeing this feature prior to 10.4.8; apparently it shipped with the driver for the new Wireless Mighty Mouse, and perhaps also shipped in the version of 10.4.7 that shipped with some recent Macs.)
More over on Daring Fireball here.
MacDailyNews Note: Mac OS X 10.2 Jaguar (released July, 2002) introduced the “Zoom” feature designed for people who need the ability to zoom in and out at will, which covers pretty much all of us. More options for other accessibility capabilities are in the “Universal Access” pane of System Preferences.
• [Command,Option,8] toggles Zoom on and off. That’s “Apple, Option, Eight” in English.
• [Command,Option,=] zooms in, centering on the cursor position when Zoom is on. “Apple, Option, Equal Sign”
• [Command,Option,-] zooms out. “Apple, Option, Minus Sign”
Mac OS X lets you zoom in and out on your screen with ease – August 15, 2006
How to zoom in and out in Jaguar with ease – September 25, 2002