Follow these steps to insert a new slide into the presentation:
To add a design template or changing the existing one, selection Format|Design Template from the menu bar. Select the template and click Apply.
To change the layout template of the slide select Format|Slide Layout from the menu bar. Select one of the layout thumbnail images and click Apply.
To reorder a slide in Slide Sorter View, simply click on the slide you wish to move and drag it to the new location. In Normal or Outline View, click the slide icon beside the number of the slide you want to move and drag the icon to a new location.
If you do not want a slide to appear during the slide show, but do not want to delete the slide as it may be used later, the slide can be hidden by selecting Slide Show|Hide Slide from the menu bar. To add the slide back to the slide show, select Slide Show|Hide Slide again.
The Custom Slide Show feature allows you to select the slides you want to display in the slide show if not all the slides should be used.