Unless you are into vba the easiest way is to create a one slide custom show
(make the slide then slide show > custom shows> new) Use the pause button to
hyperlink to it and then tick "show and return"
This method though will not continue to show the current screen during the
pause.
To pause you could also use the "S" key which will retain screen info
vba solution
Copy both these subs to a module in vb editor
With your pause button make the mouseover action macro - pauses and the
click action macro start again
Move the mouse over the button to pause and click when you want to restart
(or just use two buttons)
Sub pauses()
ActivePresentation.SlideShowWindow.View.State = ppSlideShowPaused
End Sub
Sub startagain()
ActivePresentation.SlideShowWindow.View.State = ppSlideShowRunning
End Sub
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_____________________________
John Wilson
Microsoft Certified Office Specialist
http://www.technologytrish.co.uk/ppttipshome.html