If you purchased a Microsoft Natural Ergonomic Keyboard 4000, and the Zoom slider is not working on your keyboard, then follow these steps:
Difficulty: Easy Time: Little
Problem: The Zoom Slider on the Keyboard does not Work
Problem: Zoom slider is not working
Cause: The speed of the slider does not allow the slider to zoom. This can be easily fixed. Follow the steps below carefully.
1. Click Start, and go to Control Panel
Make sure that Enable Zooming and Enable Accelerated Zooming have been checked.
That’s it! The issue should be resolved!