To Create a Flat Surface
1. Click > > 
Plane. The Plane dialog box opens.
Plane. The Plane dialog box opens.2. Click the required check boxes for defining the surface:
◦ Full—Creates a complete cylinder of 360 degrees.
◦ Domain—Uses the selected domain for creating the surface.
3. Select the references for the flat surface.
◦ Coordinate system—Selects the coordinate system. This coordinate system is used as a reference for manipulating or moving the surface.
◦ Origin point—The point that you selected on the facet is the origin point of the flat surface, if it is not explicitly defined. For analytical surfaces, if you want to define the origin point before the creation of the surface, you can only select datum points. After creating the surface, to modify the origin point, you can select any location on the facet for defining the origin point.
The surface is translated in a direction normal to itself such that the origin point and the facet point lie on the same plane.
Restyle displays the x-, y-, and z-coordinates of the origin point in the respective Origin point coordinates boxes. You can change these coordinates to move the origin point. The surface moves with respect to the origin point.
◦ Direction—Selects a datum plane or an axis as a directional reference where required. The orientation of the surface depends upon the directional reference.
4. Under Direction angular dimensions, change the angle that the flat surface makes with the direction vectors to rotate the flat surface in the required direction.
5. Click OK.