Select
Selects an existing geometric construction object, such as a curve or surface, to edit or delete.
Add
Selects geometry that defines a new geometric construction. This option is used with the numbered step options listed below.
Delete
Deletes a selected geometric construction.
Cancel
Cancels the macro, closes the geometric construction ribbon and the Geometric Construction Palette dialog box, and then returns to the main command ribbon.
Close
Verifies the validity of values selected for the options, closes the geometric construction ribbon and the Geometric Construction Palette dialog box, and then returns to the main command ribbon. The selected values are still available when you click again on the main command ribbon.
Geometric Construction
Displays the current geometric construction interface. You can also select:

A different, recentlyused interface.

More  Opens the Select Geometric Construction dialog box. For a new geometric construction, all interfaces delivered with the software are available. For an existing geometric construction, only similar interface types are available.
Geometric constructions displaying only in the Select Geometric Construction dialog box are not intended for general usage. You should first consult your Intergraph support representative before using these geometric constructions.
1
Specifies the point to use as the coordinate system origin.
2
Specifies the point to define the direction of the first axis of the value selected for Assign Axes To. For example, if (z,x) is selected, this point defines the direction of the Zaxis.
3
Specifies the point to define the general direction of the second axis of the value selected for Assign Axes To. For example, if (z,x) is selected, this point defines the general direction of the Xaxis. This point must be on the (first axis, second axis) plane.
Reject
Clears the selections for the current step.
Accept
Accepts the current selections and displays a preview.
Continue
Completes the geometric construction definition. The ribbon continues to display so that you can define parameters for additional geometry.
The geometric constructions are not created and saved to the model until you click Finish on the main command ribbon to create the model object.
Assign Axes To
Specifies the axes to define by the selected points. The first value defines the axis for point 2. The second value defines the axis for point 3. Select (x,y), (y,z), (z,x), (y,x), (z,y), or (x,z).
Coordinate System
Specifies the direction of the third axis. Select Direct to use the righthand rule to define the third axis. Select Indirect to define the third axis in the opposite direction.