when I try to install xscreensaver, it comes up say that it has been installed. I have tried rebooting after the first installation of xscreensaver and I never got the option under preferences to go to screensaver.

Is there anyway to uninstall xscreensaver so I can try again?

Hello!
I am having a bit of trouble disabling the screen saver and screen blanking.
I have followed the instruction in the guide: https://forum.magicmirror.builders/topic/236/complete-setup-tutorial

I can not edit the autostart file or replace it.
I have tried installing xscreensaver, but it doesn’t show up under preferences like what I have read.

Any help would be great!

Edit: When ever I try to use the terminal to edit a file, whether the autostart or the lightdm.comf , the command can not be added as the pi says that there is no file or directory there to edit.