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Open Diagram - If the main application is Marine Diagrams or Cable Diagrams then the Visio diagram will be opened. Otherwise the system will try open the SVG document.

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Center - This is the same as the Center command on the toolbar.

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Show All Connections - Sometimes items are connected to more than one line. To make the drawing easier to read other connections can be turned off.

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Expand - This is the same as the Center command on the toolbar.

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Collapse - This is the same as the Center command on the toolbar.