You can begin playing a slideshow of your photos from within your Library, an Album or a Tag. By clicking on a file’s thumbnail image, it will bring the file into the file viewer. Along the top of the viewer, you will see an option to "Play Slideshow."
Click on that option and the photos will begin changing automatically as a slideshow. You cannot make any adjustments to the speed of the slideshow or any other edits using the "Play Slideshow" feature.
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