Igor Micev (5/16/2014)
CTRL+T - for text
CTRL+D - for grid
in my ssms 2008r2, 2012 and 2014.
And in mine for 2008R2 and 2012.
Don't understand why all these people are claiming the answer is wrong. Maybe they just haven't noticed that the action for CTRL+D depends on context - if you currently have results to text it switches results to grid. If you already have results to grid, it does something different, namely nothing.
edit: Ah, I now see that earlier today the wrong answer was right (and there was a wrong word too). I should have read to the end of the discussion to date before commenting (and wouldn't have commented if I had seen Steve's post).