After having gotten used to Unity on the Ubuntu desktop, with Ubuntu Artful it is time to say goodbye. When Ubuntu first added the Unity shell with just the sidebar with big buttons, in favor of the more traditional GNOME with its Windows 95 style interface, many were skeptical, me included. But removing the clutter was good, and I've happily worked with it for years. And you really don't want to waste time tweaking your desktop away from the OS provided defaults.
Ubuntu has now moved on, and now I'm faced with a new shell, the (new) GNOME Shell. Here are some tweaks/tips to make things bearable/usable for those moving from Unity.
CTRL-ALT IS NOW SUPER
Moving windows to LEFT/RIGHT. Locking the screen: no more CTRL+ALT+left/right/L, now it's SUPER+left/right/L. This one requires updates to the muscle memory.
THE CLOSE CROSS HAS MOVED BACK TO THE RIGHT
Unity moved the window buttons to the left (to be more like OS X, I guess?), and now they're back on the right again. I'm hesitant about switching this back to the left. (Change as little as possible.) But it feels like I have to move my mouse more to the right side of the screen than usual now.
Switching back and forth is a matter of:
$ gsettings set org.gnome.desktop.wm.preferences \ button-layout 'close,minimize,maximize:' # buttons left
$ gsettings set org.gnome.desktop.wm.preferences
button-layout ‘:minimize,maximize,close’ # buttons right
FIXING THE ALT-TAB APPLICATION SWITCHER
Both in Unity and in GNOME Shell the default Alt-TAB behaviour does some crazy application switching with window-subswitching. That has never been usable and needs fixing ASAP.
In Unity you would use ccsm and disable the Ubuntu Unity Switcher, and then enable the Classic Switcher.
In GNOME Shell, it is even easier. It can be adjusted using the “Switch windows” and “Switch applications” shortcuts, either through Settings -> Devices -> Keyboard -> Keyboard shortcuts, or through the CLI:
$ dconf dump /org/gnome/desktop/wm/keybindings/ | grep -E '^switch-(application|window)s=' switch-windows=['<Alt>Tab'] switch-applications=@as 
$ gsettings set org.gnome.desktop.wm.keybindings switch-applications "" && gsettings set org.gnome.desktop.wm.keybindings switch-applications-backward "" && gsettings set org.gnome.desktop.wm.keybindings switch-windows "['<Alt>Tab’]" && gsettings set org.gnome.desktop.wm.keybindings switch-windows-backward "['<Shift><Alt>Tab’]"
ADDING SECONDS TO THE CLOCK
Another gsettings to add seconds to the clock.
$ gsettings set org.gnome.desktop.interface clock-show-seconds true
KEYBOARD SHORTCUT BASED WINDOW POSITIONING
With Unity (actually Compiz), I could position three windows side by side (widths 33%, 34%, 33%) on my very wide screen using CTRL-ALT-num4, CTRL-ALT-num5 and CTRL-ALT-num6. After enabling “Cycle Through Multiple Sizes” in the CompizConfig Settings Manager (ccsm), in the Grid plugin's Resize Actions page.
For GNOME Shell, there is the Put Windows extension that works for the left and the right positioning. (Again, use SUPER instead of CTRL+ALT now.) However, as of writing this, it needs tweaks to correctly positioning the center window. (See below.)
Setting up extensions is oddly enough done through your browser. You can open up the Looking Glass “extensions inspector” with ALT-F2 “lg”, but that's only used for debugging. You'll need the browser plugin too. For the Chromium browser, you'll apt install