Placing the main view

If somewhere the thread lines show up (where it is unnecessary) than hide that part in the Layer tree (ll macro). Aware that not in the whole assembly, just in the selected view:
From the list select the view (e.g.: new_view_1) and Thread > *Part name* > *Problematic hole name* > Right click > Hide

If you want to delete a contour line: Layout tab > Edge Display > Erase Line > click on the selected line > middle button.