After you’ve selected an album, you can browse through your photos and videos.
Depending on how you hold your phone, the screen automatically switches to either grid view or filmstrip view:
While in grid view, slide your finger up or down to scroll through the thumbnails. Tap a photo or video to view it in full screen.
While in filmstrip view (when you turn your phone sideways), slide your finger left or right across the screen to go through your photos and videos. Tap a photo or video to view it in full screen.