while install freebsd gnome desktop, mouse not working even properly set in rc.conf

First I installed QEMU.
In this page:
https://download.freebsd.org/releases/amd64/amd64/ISO-IMAGES/13.1/
I choose: FreeBSD-13.1-RELEASE-amd64-dvd1.iso
<https://download.freebsd.org/releases/amd64/amd64/ISO-IMAGES/13.1/FreeBSD-13.1-RELEASE-amd64-dvd1.iso>
then follow this youtube tutorial:
https://www.youtube.com/watch?v=KdBi6Jcw35s&t=573

In /etc/rc.conf:
moused_enabled="YES"

But now, I cannot use a mouse, I can use a shortcut to launch the
terminal,  and I can also install firefox.
Now  I am using a wireless mouse in the Ubuntu system.

one another pain point is that If I enter full screen in QEMU, then I need
to try several times to exit the full screen.


-- 
 I recommend David Deutsch's <<The Beginning of Infinity>>

  Jian