DebugPoint published a tutorial about installing the Xfce Desktop in Arch Linux.
How to Install Xfce Desktop in Arch Linux [Complete Guide]
In this guide, we explain how you can install the latest Xfce desktop in Arch Linux. The guide explains the steps for the latest Xfce 4.16 release, however, it works for any Xfce version as well. The first part of the guide explains the steps for installing the base Arch system.