Clear desktop or Minimize All Windows in Ubuntu

Hi All,
My system is ubuntu 20.10 and I want to creat a command to clear desktop. Ususally are open lot of application windows and I clear -not exit- windows from desktop. Can you help me in this case?
For example I have created applications “reboot” :
#!/usr/bin/env xdg-open
[Desktop Entry]
Version=1.0
Type=Application
Terminal=false
Icon[hu_HU]=gnome-panel-launcher
Name[hu_HU]=reboot
Exec=/sbin/shutdown --reboot now
Comment[hu_HU]=reboot
Name=reboot
Comment=reboot
Icon=gnome-panel-launcher

I need same “clear desktop” command.
Thanks , sgaga

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Thanks guys it works well: super+d=minimize all windows.
super+h=only actual
day by day my brain growes bigger… :slight_smile:

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