How do you create a custom presentation
see above
RE: How do you create a custom presentation
On the Slide Show menu, click Custom Shows, and then click
New.
Under Slides in presentation, select the slides you want to include in the custom show, and then click Add.
To select multiple slides, hold down CTRL as you click the slides.
To change the order in which slides appear, select a slide under Slides in custom show, and then click one of the arrows to move the slide up or down in the list.
Type a name in the Slide show name box, and then click OK.
Repeat steps 1 through 3 to create more custom shows with any slides in your presentation.