select slides
Select a slide: Tap a slide thumbnail.
Select multiple slides: In slide view, touch and hold one slide thumbnail, then tap other thumbnails with another finger. In light table view, tap a slide thumbnail, tap Select at the bottom of the screen, tap other thumbnails, then tap Done.
Select all slides: In slide view, tap a slide in the slide navigator, tap it again, then tap Select All. In light table view, tap Select at the bottom of the screen, tap Select All, then tap Done.