In the Music Editor, the "N" key toggles snap-to-grid. While that's useful, Cubase has a more "live" way of doing this, where you can hold a key to live-toggle the ability to freely drag the note you are editing. Just hold ALT and freely drag the note. It's easier to work with than a more permanent on/off button alone.
Perhaps both a permanent and live/latching option are ideal. It may even be better to add more flexibility to shortcuts. Allowing users to control whether an option is toggled ON by pressing Alt, but only toggled OFF "when ALT is released" or something to that effect. Right now, if I hold "N" it rapidly switches, rather than works like a qualifier. Hopefully that makes sense. 
Cheers!
Sean
