Dutchy, you can render drawings to any scale you want, including 1:1, both in 3D and in 2D.    I worked on a belt grinder design last year to better learn Onshape and as part of that I was able to render a full size drawing which in my case was much larger than a standard 8.5x11 page.   IIRC, the drawing is downloaded to PDF and then I used Acrobat to actually print it page by page.  Acrobat has an option to add cross hairs for alignment purposes and once I printed and taped it together, the dimensions were perfect.    This ability is perfect for printing paper templates.  

--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.