Here´s a quick tutorial on how to create a Transition Sheet Metal in TopSolid 7.3
Thank´s to Saad for this contribution!
Ok, here we go.
First create 3 offset points like in the below screenshot.
Now create a Transition Sheet Metal between point 3 and point 2.
Then create one more transition but this time between point 2 and point 1.
Now create a Transition between Absolute origin and point 1.
When that´s done you can modify the section of transition 3 to obtain this:
At this step you can use parameter D=500, H=750.
Create Sheet Metal by Thickening fo the three shapes you just created.
Don´t forget to push Shape 2 and 3 in Design representation