If your cylinder has one of the main origin workplanes central to it
(if not, you can define a new workplance through the center),
use that for a sketch, do slice graphics to see your sketch, then
when you extrude or cut the hole, pick the option to do it in both
directions and thru all.
wrote in message news:4830380@discussion.autodesk.com...
I can get a hole thru the cylinder using a work plane tangent to it, but the hole appears round on the cylinder surface, not
elliptical as it should. Any thoughts on how to correctly model this.....TIA......