How to Create a Custom Show in PowerPoint 2013
Type a name for the custom show in the Slide Show Name field.
Add the slides that you want to appear in the custom slide show.
All the slides available in the presentation are listed in the list box on the left side of the Define Custom Show dialog box. To add a slide to the custom show, select the slide that you want to add and then click Add. The slide appears in the list box on the right side of the Define Custom Show dialog box.