Is there a way of keeping in the foreground windows while I operating on others?
I am using now XUbuntu. However, I am interested also in canonical Ubuntu.
The trick was working on XUbuntu 16.04 (One of my colleagues did it for me on my old laptop and now I have no idea about the keywords to look for to replicate the behavior). Now I am using XUbuntu 18.04 and 20.04 on the two workstations I have.
windows manager
. I am going to post it as answer. Thank you for the hints