Better paper size configurations#406

I am currently printing shipping labels (mainly UPS), which I fold in half and put into shipping document pouches attached to the packages. Labels printed allways end up on the center of my A4 pages. macOS print dialog does not allow offsetting.

Ideally, Shippypro would generate an A4 PDF where the label takes up half of the space. The label as generated on UPS’ website actually does this.