Hello. I am tryign to make a mechanical non-plated slotted through hole which will allow a device some 'wiggle room' while mounting it on a board. I can't seem to make the slotted through hole appear right in the artwork. It always appears as if it is filled. Below are pictures of how the holes look in the PCB Editor, Pads Deisgner, and Gerber Viewer. Can someone explain what I need to do to make these slotted holes drilled complety through for mounting? Thanks.