Unfortunately, I can not provide a screenshot of available options since neither gnome screenshot tool nor printscreen button can't capture the screen with pop-up dialog.
** Bug watch added: GNOME Bug Tracker #781108 https://bugzilla.gnome.org/show_bug.cgi?id=781108 ** Also affects: gnome-control-center via https://bugzilla.gnome.org/show_bug.cgi?id=781108 Importance: Unknown Status: Unknown ** Also affects: gnome-settings-daemon via https://bugzilla.gnome.org/show_bug.cgi?id=781108 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1751788 Title: No power off option for power off button in gnome control center Status in gnome-control-center: Unknown Status in GNOME Settings Daemon: Unknown Status in gnome-control-center package in Ubuntu: New Bug description: There's no such an option to power off the machine on power button press. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-control-center 1:3.24.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.10.0-40.44-generic 4.10.17 Uname: Linux 4.10.0-40-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Feb 26 16:50:14 2018 SourcePackage: gnome-control-center UpgradeStatus: Upgraded to artful on 2017-12-05 (83 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-control-center/+bug/1751788/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp