i have tried but its not happening (edited for easy search by GrabCAD)
Here is a small tutorial to create Boot using Boundary Blend command !!!!!!!!
Answered with a tutorial: https://grabcad.com/tutorials/how-to-create-boundry-blend-in-pro-e
First draw the line or arc in the sketch itself
then goto Insert-----> Bloundary blend------> select the line or arc while pressing the Ctrl Button