Step 1 :查看当前设置
gsettings get org.gnome.shell.extensions.dash-to-dock click-action
默认是:‘focus-or-previews’
Step 2 :设置为’minimize-or-previews’,就可以实现再次单击使窗口最小化
gsettings set org.gnome.shell.extensions.dash-to-dock click-action minimize-or-previews
Step 3:查看可设定值
gsettings range org.gnome.shell.extensions.dash-to-dock click-action