Import your solid model or IGES file.
If necessary, transform the part so that the surfaces that represent the features are facing toward the Z axis.
Click the Feature step 
from the Steps
tool bar or the Advanced toolbar.
Select your feature type. Remember only pockets, bosses and sides can be recognized using curve chaining.
Click Extract feature from solid model and click Next.
Click Chain curves and click Next.
The geometry for the features is projected onto the plane of the UCS. Chain the appropriate geometry. See Feature recognition - chaining for more information.
The top and bottom page is displayed. Enter the top and bottom values or click the pick buttons and graphically pick the locations. Click Next. For more information see Feature recognition - top & bottom
Confirm the extracted dimensions of the feature. Modify the feature’s dimensions if desired and click Next.
The Strategies page is displayed. Click the desired attributes depending on your manufacturing preferences. Click Next. See Strategy tab for information on the specific attributes.
The Operations page is displayed. This page displays the operations that will be used to manufacture the feature along with the names of the selected tools and calculated feed and speed values. If these values are acceptable, click Finish. If you want to change the tooling or feeds and speeds click Next and follow the instructions on the screen.