I just found the APP VirtScreen on Github
https://github.com/kbumsik/VirtScreen
which works on Kubuntu with the provided .deb package.
It works on OpenSuse with the provided AppImage
https://cubiclenate.com/2019/09/04/virtscreen-on-opensuse/
But actutally with the sources provided, anyone there that puts it in the buildserce with a rpm, as it is really a helpful tool
Need some speed imporovment, but for displaying PDF or documents great.