Install your favourite desktop environment or window manager in a click.
This is the minimal installation without any extra packages. You can add later according to your requirements.
Those DE/WM which doesn't come with terminal emulator by default, alacritty is used.
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With Login manager Those DE/WM which have their own login manager or is recommended in arch-wiki, their default login managers are used, else lightdm is used as login managers.
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Without Login manager
startx
command is used to start the gui after logging in to tty. xorg-xinit package is used for this, creating .xinitrc file in your home directory.