The following geometric construction interfaces create coordinate systems.
Each command supporting the option displays tabs and interfaces appropriate to the command.
Coordinate System by Lines  Creates a coordinate system from two lines. The first line defines the first axis. The second line defines the general direction of the second axis. For more information, see Coordinate System by Lines. 

Coordinate System by Points  Creates a coordinate system from three points. The first point defines the origin. The second point defines the direction of the first axis. The third point defines the general direction of the second axis. For more information, see Coordinate System by Points. 