So I'm using a design by Limi Limi
https://play.google.com/store/apps/details?id=org.kustom.slideup&hl=en_US
When I look at the design in the app, it displays properly when sliding from screen to screen, but when I load it on my phone, it doesn't slide all the way on page 1. Here's as far as it goes.
I see now a 4th page was set. I didn't see a place to limit the number of pages in Nova, but if you hold down on the page you can see an extra page. You can then drag the page to the trashcan. I'll leave this just in case for the next newbee see this or you can delete. Solved.
John