Thank you John!

It did work to import the 11x17 dwg template.

Is there a way to create your own layout within an already existing autocad file or do you have to use templates?

I haven't found a template for a 24x18 sheet, for example, which is a size I use frequently.

Or can you create your own template file?

I've just never created layouts this way, though it may have something to do with the fact that I'm coming back to Autocad after years of not using it!