Diagram options
In this section, you can change the background color of a diagram and display table shadows in a diagram by checking a checkbox:
Diagram notation: You can change the diagram notation and choose between Relational, IDEF1X, Conceptual (Crow’s foot) and CODASYL. To do so, choose your favorite notation from the dropdown list.
Show grid: Check this option to show/hide the grid in the diagram area.
Snap to grid: Align objects created in the diagram area to the grid.
Available in: Standard, Professional and Enterprise Editions