When copying a layout to make a new page, any objects that are on turned off layers do not copy with the layout. Is there a way to include all objects, even turned off layers, in the copy process? Why isn’t this set as on on default?
The general rule in Rhino is if an object is not displayed, it is ignored with whatever operation you’re doing.
The best option is to make sure you can see everything you want copied before you do the copy.