Why do my CTRL-[num] keyboard shortcuts no longer work?
 In Mathematica 6, CTRL-[1] inserts a new graphic object and CTRL-[2] inserts a SqrtBox object into your selected notebook window. However, Mac OS X 10.5 (Leopard) defines CTRL-[1] through CTRL-[4] to select windows in spaces and masks Mathematica's definition of these keyboard shortcuts. To revert these keystrokes to use Mathematica's default behavior follow these instructions: | 1. | Open the System Preferences. |
| 2. | Click the Exposé & Spaces icon. |
| 3. | When the dialog appears, select the tab. |
| 4. | At the bottom, you will find a drop-down menu titled . |
| |  | Exposé & Spaces Dialog Box |
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| 5. | Our recommendation is to change this from using CTRL to OPTION. Both the CTRL and APPLE keys have useful associated shortcuts in Mathematica. |
Once you make this change, Mathematica's CTRL-[1] and CTRL-[2] keyboard shortcuts will work as expected.  Download this FAQ as a Mathematica 6.0 Notebook
Questions or comments? Send email to support@wolfram.com.
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