Navigating the array would be done via array actions like Array.At(X, Y) or similar, it's all covered in the tutorials linked previously.
Don't really understand what you mean by 'see it in realtime'? For debugging or what? You could make text where you print array contents each tick.
for each value array (x,y)
append array.CurValue to text
if array.CurY = array.width-1
append newline to text
if you wish to do something roguelikish and generate maps using array.. I'll post a little example soon.
EDIT: Here you go dl.dropbox.com/u/19921470/roguelikish_map_generation_via_array.capx
Simple eaxmple, a playable roguelike would of course need much more sophisticated randomization. And thou shall not mock my artistic skills :)