Setting screen timeout period on 14.04 clients?

[David Groos]

Hi All,
I'm trying to change the settings (on lts.conf?) such that when I'm
broadcasting an image/chart/presentation or whatever on student screens
(thanks to epoptes) the screen doesn't require a student to move the mouse
to keep the screen active. I searched this page:
http://manpages.ubuntu.com/manpages/trusty/man5/lts.conf.5.html to no avail.
Thanks,
David G
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