Being a newbie I figured I would need to go into the terminal to fix this.
xfce -> settings -> xfce power manager -> display -> maxed out all 3 settings to 60 min.
Now I can walk away - and come back to the screen I left.
All I can tell you is that I am sent back to the exact same screen as the initial Login screen after I leave the computer idle for some time time.
I have installed Antergos xfce on an old Dell 64-bit.
I did that quite some time ago, but I’m still a newbie.
When I get up to take a piss or get a snack or just look out the window I come back to the Login screen again.
It has become a nuisance as I do one or the other of those things frequently.
a) extend the time before that happens?
b) be able to RE-login with a simple single key tap?