Defines the constraints to Enables / Disables some features of Snapping. None - Snapping does not happen ShowHorizontalLines - Displays only the horizontal gridlines in diagram. ShowVerticalLines - Displays only the Vertical gridlines in diagram. ShowLines - Display both Horizontal and Vertical gridlines. SnapToHorizontalLines - Enables the object to snap only with horizontal gridlines. SnapToVerticalLines - Enables the object to snap only with horizontal gridlines. SnapToLines - Enables the object to snap with both horizontal and Vertical gridlines. snapToObject - Enables the object to snap with the other objects in the diagram.