Changing Grid Settings
By default, the Modeling workspace displays a grid and drawing elements snap to the grid.
To toggle the grid, click View. From the Show/Hide section, click the
icon.
To toggle grid snapping, click View. From the Show/Hide section, click the
icon.
To change grid spacing, click View. From the View Options section, check the User Grid Spacing box and type the spacing you would like, in millimeters.