Keyboard Shortcuts, etc. in  PowerPoint Presentations (For PC)
  The F5 Key launches the  full screen presentation at the first slide (from Normal/Slide Sorter/Notes view)

 

 The B  key will blank the screen (Black). (Pressing the key again returns to the presentation)

 

 The W  key will blank the screen (White). (Pressing the key again returns to the presentation)

The A key Displays the mouse pointer

The N key Displays the next slide,

The P key Displays the previous slide,

The Esc key ends the presentation

The F1 Key displays a full list of shortcuts  (click here to view)

Pointer Options (See XP version)

Usually during a presentation the mouse pointer will disappear after 10 seconds. To keep the arrow visible throughout the presentation, right mouse click, select "Pointer Options" and then "Arrow".  If wish to have the pointer hidden after 10 seconds again, click "automatic". To have no pointer at all, click "Hidden".
Clicking on "Pen" changes the arrow to a pen, and you can then annotate  on screen. Clicking pen colour gives options for the colour that will appear.  To use the pen during the show, left mouse click and hold. Press the E key to erase any annotations  you have made. The F1 Key displays a full list of shortcuts  (click here to view)
All changes made in pointer options are removed when you end the show.