[xubuntu-users] Settings for xfce4-screensaver

[MR ZenWiz]

As of Xubuntu 21.10, which I run on my main desktop (only),
xscreensaver no longer works as I would like, I have dropped back to
xfce4-screensaver, which I can set up almost the way I like.

However, I would like to modify some of the timings it uses. E.g., I'd
like to increase the length of time each pic in the slideshow appears
on the screen before switching.  It's about 10 seconds and I'd like to
make that more like 30 seconds.

How do I do this?  I haven't found a way or a config file that controls this.

Thanks.

Mark