Adding flanges to a solid starting from a profile

To accomplish this task, open file "ExtFlan01.e3". After starting the Extruded Flange command, proceed as follows.
 

1	Select the profile that will be used to define the direction of the flange. About the profile The profile to be selected must: Be open Contain only lines and arcs Have one of its endpoints on an edge of the solid. To change the selected profile, right-click on Profile, choose Reset in the context menu and select another profile.
2	In the Type drop-down list select Edges.
3	Select each of the edges on which to create the flanges. A preview of the corresponding flange is immediately displayed after selecting each edge. To change the selected edges, right-click on Edges, choose Reset in the context menu and perform selection again.
4	Click or to confirm your selections and create the flanges. Click to discard your changes.