The Draw panel in the new AutoCAD 2010 Subscription Advantage Pack includes the new Add Selected tool.
With this tool, you can quickly create a new object in your drawing based on the properties of an existing object. For example, if you use the Add Selected tool and select a polyline, AutoCAD automatically launches the PLINE command with basic object properties including color, layer, linetype, linetypescale, lineweight, plotstyle, and material pre-set to match the selected object.
View demo video (This video doesn't have audio)

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