Changes

'''At your presentation''': The ''em cee'' will give you full control of the presentation software, and you'll be able to [https://support.google.com/plus/answer/1660627?hl=en&ref_topic=3008152 share your full screen or just a window] with the participants -- they will see what you see on your screen. Audio tones will cue you as to how much time you have left: four tones is four minutes left, three tones is three minutes left, and so forth. Two quick high-pitched tones means you have thirty seconds, and a long high-pitched tone means that time is up. You may want to run you own countdown timer to keep track of time as well.