If you were using OS X Lion or Snow Leopard before upgrading to OS X Mountain Lion, you would probably had noticed that the Control + Scroll function was missing – for those who don’t know, it’s a zoom feature whereby you can zoom to any part of the screen.
Well, the feature wasn’t removed from Mountain Lion, Apple didn’t kill that dead useful feature. It was just disabled by default. How do you enable it you say? Read on!
- Open ‘System Preferences‘ and select the ‘Accessibility‘ button.

- Next, Select ‘Zoom‘ on the sidebar.

- Then, you should see ‘Use Scroll Gesture With Modifier Keys to Zoom‘. Check that.

You’re good to go. Enjoy!
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thanks, was affraid it was removed
That’s a big relief. I use this feature a lot, being a teacher.
Thanks!