[Zubersoft]

It just depends on the aspect ratio of the device versus the aspect ratio of the file. If you set it to "Fit Height" on the older tablet, the page is stretched to fit the full height of the screen, but this pushes the edges of the page off the sides, because the tablet has a widescreen aspect ratio, not a 4:3 like most A4 pages. If you set it to "Fit Screen", then it leaves a space at the bottom, because it enlarges it as much as possible until the sides of the page hit the sides of the screen. Your new tablet has an aspect ratio closer to 4:3, so you don't have this problem. So in short, you either have to accept black space with "Fit Screen", set it to "Full screen" and have the page be slightly distorted, or you have to crop the file to match the aspect ratio of the tablet.

Mike