One question...

Theme: Package, component in PCB

How can i add a plain mounting hole with no copper?
You can place a mounting hole from menu "Elements" point "Place mounting drill hole". The cursor changes and you could place a hole with a normal click. If you want no copper, press key [o] for options before you place the mounting hole. Now you can enter zero for copper height and width. Click button [ OK ] and place the holes.