Craft Edge

I am contemplating buying a Cricut. I notice that there is an option to save an SVG as Design Space Compatible. What is this for? I thought I could just use regular SVGs. I have SCAL-4

I want to see all the pages, one on top of the other, not just what is on the mat that is visible. I could do that in SCAL 2.

I want to see them bring this feature back. It was available in Version 2.

Scal 2 has two buttons on top - one for page preview and one for preview all so I could see all my pages lined up. I make name books. I can't find that in SCAL 4

In SCAL 4 for MAC where is the option for Preview All to see all pages?