Reference Axis
You can create a reference axis, also called a construction axis.
To create a reference axis:
Click Axis on the Reference Geometry toolbar, or click Insert,
Reference Geometry, Axis.
Select the axis type in the Axis
PropertyManager, then select the required entities for that type.
Verify that the items listed in Reference
Entities correspond to your selections.
Click OK .
Click View,
Axes to see the new axis.