To Preselect Datum References
As a time saving measure, you can first select any of the following combinations of references in the graphics window, and then click > 
Plane to define a fully constrained datum plane. This feature allows you to quickly define datum planes without using the Datum Plane dialog box.
Plane to define a fully constrained datum plane. This feature allows you to quickly define datum planes without using the Datum Plane dialog box.References | Results |
|---|---|
Two coplanar edges or two axes (must be coplanar but not collinear) | Datum plane is created constrained through the references |
Three datum points or vertices (must not be collinear) | Datum plane is created constrained through each of the datum points/vertices. |
A datum plane or planar surface and two datum points or vertices (points or vertices must not be collinear with the normal to the plane) | Datum plane is created normal to plane through the selected points. |
A datum point and an axis or straight edge/curve (point must not be collinear with the axis or edge) | Datum plane is created constrained through the datum point and the axis/edge. |