Install kwin window manager

To install the kwin window manager:

sudo pacman -S kwin

Simple as that. But you need to install also the kde-cli-tools  which will enable the use of the Window Manager Settings:

sudo pacman -S kde-cli-tools

Substitute xfwm4

Option 1: Edit xfce4-session.xml

For this option it is required to edit the XML file that Xfce uses at startup. A file that stores a bunch of default commands and options.

sudo nano /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfce4-session.xml

Find the line that looks like this:

<value type="string" value="xfwm4"/>

and change xfwm4  with kwin_11  like this:

Save the file and that’s it. Log out and log back in again!

Option 2: Application Autostart

For this option you need to go to “Settings –> Session and Startup” and add a new item under “Application autostart” like the image bellow:

Enjoy!