I have installed some digital signage that is showing a looping PowerPoint in the hallway for the days announcements. The ppt is on a shared network drive that the teachers can open and insert a new slide with their announcement. What I am trying to do is create some sort of theme or master slide that won't allow them to change the theme, font, background, etc.. so each slide has a consistent theme. Does anyone know of a good way of doing this? Or a totally different way? Thanks!