Problem with master slides in ppt
Hello, I am a freelancer and I use ppt for my clients every day. Since 4 days a problem occurred on PPT impossible to find a solution... Yesterday I sent a message on the Microsoft Chat, but the person did not find where the problem came from. When I go to "slide master", as soon as I make a modification on a slide and I click on the next one, the slide where I made modifications disappears, without any reason. If I do Com+Z (Mac) it doesn't come back either. And even if I click on one slide and then another the first one I clicked on will disappear. I have installed, uninstalled, done all the manipulations that your colleague gave me, the problem persists. Can you help me? Thank you