clairestar2003

Hi, I've just started using vectorworks for my interior design course and was setting it up as the tutor wanted but I seem to have change the amount of grid squares in the drawing bit (what's that even called?!) from loads to 4 large ones. How do i change it back? I ended up adding a new layer but I know that's not the solution and now I can't get rid of the layer either! Thanks for any help