Pinephone64 terminate apps

Using openSUSE-Tumbleweed-ARM-PHOSH-pinephone.aarch64-2023.03.02-Build73.8.raw. I have no obvious way for shutting down running apps. CTL-c and CTL-z have no effect Any advice will appreciated.

Googling shows that you need to kill the process (applies for most of the linux distributions which support the Pinephone).

Well that would be my normal “last resort”, but as “top” displays only the left hand side of the output I can’t see which app is running. I connected a monitor but all it shows is the startup logo.