I have part with holes in it. But when I open that part as component in new window, holes missing. How to change that and how to withdraw changes from assembly to part?
I assume the holes were created as an Assembly feature? If yes, see #19 at Frequently Asked Forum Questions.
Propagate the cut to the part level in the assembly cut extrude.
Then either right click the sketch, list the external references, and break the external reference or use that cut extrude to trace another cut extrude making sure you don't use any relations the original cut extrude uses.
Either way your going to have to dimension the intent of the holes. Either that or fix them in place.
Retrieving data ...