Offset Curve
Command
Offset Curve
Shortcut
O
Button
Right of Command Bar 
Unified command for Offset Vertex, Offset Planar Curve, Offset Region, Offset Face Loop, Offset Edge. The command is run based on the selected object.
- When Vetices are selected: Offset Vertex.
- When Curves are selected: Offset Planar Curve.
- When Regions are selected: Offset Region.
- When Faces are selected: see Offset Face Loop in the Solid Commands section.
- When Edges are selected: see Offset Edge in the Solid Commands section.