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[ INSTALL KDE IN PARROT ]

sudo apt install kde-plasma-desktop

[ INSTALL BISMUTH ]

echo "deb http://deb.volian.org/volian scar main" | sudo tee /etc/apt/sources.list.d/volian-archive-scar-unstable.list>/dev/null
wget -qO - https://deb.volian.org/volian scar.key" | sudo tee /etc/apt/trusted.gpg.d/volian-archive-scar-unstable.gpg>/dev/null
sudo apt update && sudo apt install kwin-bismuth

[ INSTALL KDE IN ARCH ]

pacman -S --needed xorg sddm
pacman -S --needed plasma kde-applications

[ INSTALL BISMUTH ]

sudo dnf install bismuth

[ NOW GO TO ]

[ SETTINGS > WINDOW MANAGER > WINDOWS TILING ]

[ NOW TO CHANGE ALL NUMBER TO 30 ONLY LAST ONE CHANGE TO 25 ]