Microsoft PowerPoint 2010
If you hide a slide, it does not appear when running the slide show. You can unhide it at any time.
Alternatively, you can create Custom Shows to select which slides to display in a presentation.
Alternatively you can right mouse click on selected slides in the Slides area in Normal view or on a selected slide in Slide Sorter view then choose Hide Slide.
To unhide slides, select a hidden slide and repeat the steps for hiding a slide.