You can pause the slideshow if necessary. Hide the current slide of the presentation and display a black screen instead.
To do this, on the Control bar, click More. In the drop-down list, check the Black Screen box.
If the slides in the presentation were advanced automatically, the slideshow stops and the Pause button turns into the Play button.
To display the current slide again, do one of the following:
•On the Control bar, click More. In the drop-down list, uncheck the Black Screen box.
•Perform any action to move to the previous/next slide.
•On the Toolbar, click Play.
•If you want to continue the presentation from a slide other than the current one, click Slide Thumbnails on the Toolbar and select the desired slide on the Slide bar.