Switches to slide view, where you can work on one slide at a time.
Slide Sorter View
Displays all slides of your presentation in small size , complete with text and graphics. In slide sorter view, you can reorder slides, add transitions and animation effects, and set the timings for electronic slide shows.
Slide Show (from Current Slide)
Runs your slide show, beginning with the current slide if you're in slide view or the selected slide if you're in slide sorter view.