The Options section of the Style Rules pane allows you
to enable or disable various facilities at the level of the diagram
as a whole. Each diagram you work on has its own style sheet and therefore
its own options.
There are options for the following aspects of the diagram:
There is a Styling Customizer for each of these facilities
to set the styling properties. The Styling Customizer appears in the
lower pane of the Designer when you select the option in the Style
rules pane.