The Grid command is a toggle switch which displays or hides the hexagonal grid in the Graph view and the rectangular, unit square grid in the Layout view. This grid is primarily of use when you want to add departments to the project or when you want to adjust the created graph manually, since department nodes can only be located on the vertices of the hexagonal grid. The size of the unit squares in the Layout view can be changed with the Grid Size command of the Display menu.
For more information see: