An auto-show (auto-slide show) has faint control buttons in the upper-right corner that will light up on a mouse-over.
To view the photos manually, select the pause button, and use the prev and next buttons to cycle through the photos; the resume (play) button restarts the cycle with the next-in-line image, the exit button exits and closes the window.
The first photo may linger a couple of seconds, and it may look weird for a second or two if the photos have not finished loading.
Grand Canyon Hike Photo Gallery - On the Trail
On the Trail Photo Gallery is photos of the trail and hikers on the South Kaibab Trail descending into the canyon from the southrim, and, after an overnight stay at Phantom Ranch, climbing out of the canyon on the North Kaibab Trail in Bright Angel Canyon.
Select a tile to view its photo or View Photos for an auto-show of the photos.