How to install xfce in Tumbleweed?

I didn’t install xfce when I was installing Tumbleweed, but I would like to add it now. The problem I’m having is that when I try:

sudo zypper install xfce4

I get back something to the effect that the system is unable to locate a provider of xfce4. I gather this could be because the package is under a name other than xfce4 or it could be because I need to add a repository.

What is the proper way to install xfce4?

Thanks very much!

Yast=>Software Manager
Choose Patterns in tabs across the top.
Put a checkmark in front of XFCE Desktop Environment.
Click the “Accept” button.

Or:

zypper in patterns-xfce-xfce

Thank you so much! It’s so simple, but I never would have figured it out.

It’s probably easier if you use Yast Software Management for that kind of thing.