This command aligns a grid object with the current view. The grid object is aligned so that it's coplanar with the view and oriented with the top of the grid at the top of the view.
To align a grid object with a viewport:
The grid object rotates to align itself with the selected view. The grid object is now planar, or parallel, with the viewport.
The grid object rotates to align itself with the selected view. The grid object is now planar, or parallel, with the viewport.