Here is how you do it in VX:
In the drafting module, I assume that you have a layout of a 3D part.
Let me know if you need images.
- Select Insert > 3D View > Sections
- In the options form under Required Inputs, select "Revolved"
- Select the side view with the hole.
- Select the base point so that you are on the centerline of the hole.
- Pick vertical.
- Adjust the Base arrow or the Align arrow so you are not sectioning all the way through the part.