Acer DV555K User Manual page 53

Slideshow Settings
When in photo viewing mode, it is possible to change the viewing duration of an image (or all
images in a playlist), using a slideshow. Use the [YELLOW] button to display these slideshow
options.
Slideshow Time: Set the time to wait between presenting each image in the slideshow:
• 3 seconds-20 seconds/1 second intervals
OSD (On-Screen-Display) Controls | 51