I took three tablets I use at home (Surface Pro 1 and Surface Pro 3 on Windows 10 and a Surface Pro 3 on Windows 8.1) and set their resolution to 1280 x 800 and DPI (Microsoft "dummy downed" the DPI term to be "change the size of text, apps and other items: 100%") and BLS-2016 28.04.04 appears normal with no flashing or changing of sizes or menu showing off screen or menu being a different size.
I also set a couple of Windows 8.1 and Windows 10 computers at the office to the same resolution and DPI and did not reproduce the issue either.
There were not any adjustments made in any BLS-2016 relating to display that would or could cause this. We've also not had any other reports from any other customer regarding this issue, which leads me to believe this is something isolated to your particular tablet.
Double check the settings - Kerry gave a good link to settings info.
Also check your video drivers. We've seen, from past years, drivers, such as what installed in some Sony tablets and laptops, not allow changing from a custom DPI that was 133% if I remember right. They locked it in and prohibited changing. It was an issue that affected many different software products, including ours. They never fixed the issue before Sony exited the computer business.
Also, make sure you're not changing any compatibility settings in the shortcut for BLS, such as reduced color mode, run in 640x580, disable display scaling on high DPI settings or compatibility mode.
CDE Software Staff
Remember to always make sure you've downloaded and installed the most current update to see if issues experienced have been corrected.