To start a presentation in Presenter View even if you have only a single display, press Alt+F5.
Sandhya Answered question
Frequently used shortcuts
To do this Press
Start the slide show. F5
End the slide show. Esc
Print a presentation. Ctrl+P
Save the presentation. Ctrl+S
Vishalini.R Answered question

Press the F5 key to start the slideshow of a PowerPoint presentation.
To exit from the slideshow, use Esc (Escape Key).