To switch from Gnome to KDE Plasma on Arch Linux, you can follow these steps:

First, make sure that KDE Plasma is installed on your system.

If it is not installed, you can install it using the package manager by running the following command in the terminal:

sudo pacman -S plasma

Once the installation is complete, you can log out of your current desktop environment and log in to KDE Plasma.

You should see an option to select a different desktop environment at the login screen.

Select KDE Plasma as your new desktop environment and log in.

You should now be running KDE Plasma on your Arch Linux system.
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