gnome-shellminimizeubuntu-dockwindow
I opened 4 terminals, 3 are visible, the other is minimized.
I want to restore the minimized window, i.e. have the 4 windows visible.
I click the terminal icon, it shows 4 previews. Which preview should I click to restore the minimized window?
Anyway, my goal is to restore the minimized window. If there are better ways, please tell me.
The GNOME Shell extension Window Corner Preview is exactly what you were looking for! Follow these instructions in order to install it.
With Window Corner Preview simply select a window or workspace you wish to preview:
And you will have the window in the top-right-hand corner (although if you left-click on the window preview you can make it go to the opposite corner, right-clicking the window preview will cause it to go to the next corner along in clockwise motion).
If you wish to simply see what is behind the window preview just cursor over it and it will go mostly transparent:
To hide the window preview just use the On/Off slider you saw in the first screenshot which can be used once you have made a window or workspace selection from the list.
You can change the click-action on Ubuntu Dock icons. Open Terminal and run
gsettings set org.gnome.shell.extensions.dash-to-dock click-action 'minimize'
Now if you click on an application icon with multiple open windows, it will switch between minimising and restoring all windows.
Best Answer
One possible solution is to use the GNOME shell extension Window List. It displays a list of windows at the bottom of the screen and also greys out minimised windows.
For example in the screenshot below there are four Nautilus windows open, with first two being minimised.
(note that it also puts square brackets around the minimised window title)
Refer to this for installing and managing GNOME extensions: How do I install and manage GNOME Shell extensions?