I recently installed Ubuntu 20.04 LTS and an important feature is missing: the option to switch between GUI and TTY.
From the GUI I can switch to one of 4 TTY, by Ctrl-Alt-F3 to Ctrl-Alt-F6. I can login in the tty, do whatever I wish. When I Press Alt-F1, I get to the login-screen, not back to running GUI session.
How can I customize 20.04 LTS in this way?