I have a detail view of 4 holes in a machined pocket on a weldment. The center marks show up on the orthographic view but when I go to my detail view I need to rotate the center marks to be able to dimension the hole positions based on a known edge. When I add them and rotate them they disappear from the view but when I highlight them in the detail view is acts as if they are still there. I don't know why it keeps doing this. Does anybody have a solution?