Insert Above / Insert Below interferes with Mac OS X

[hanxue]

In Mac OS X, the Ctrl + ↑ and Ctrl + ↓ keys are used for Mission Control by default.

Using Ctrl + Shift + ↑ and Ctrl + Shift + ↓ will also active the OS shortcuts; with the effect taking place slowly.

Is it possible to change the keyboard binding to something else, or add an option to rebind keyboard shortcuts?

P/S: the default keyboard shortcuts in Scala Notebook is great, and makes more sense than iPython Notebook's Ctrl + m modifier.