Notices of Yahoo emails come up spontaneously in a separate window on the screen, displaying the sender, and covering up whatever I'm working on. There's a delay, so they are often not even current emails. You have an option to "dismiss" each one, but the next one just comes up. I have no need to see these since I can easily just open email when I want to read emails. I'm worried that if I do a public slide show, these email notices will still be coming up over the screen and be very distracting for the audience.