I have never tried to get rid of the "page" because I use it. You can make it any size you want....it doesn't have to be 8 1/2 x 11. I usually make the page the same size as the sign I'm working on.
If you want to make it seem as if it's not there, you could make the page huge...like 10 feet x 20 feet...then you wouldn't be able to see it unless you zoom way out.